The SpaceX Crew Dragon trunk was secured to the spacecraft on Thursday, April 30, 2020, at Cape Canaveral Air Force Station, Florida, in preparation for the Demo-2 launch with NASA astronauts Robert Behnken and Douglas Hurley to the International Space Station for NASA’s Commercial Crew Program. Crew Dragon will carry Behnken and Hurley atop a Falcon 9 rocket, returning crew launches to the space station from U.S. soil for the first time since the Space Shuttle Program ended in 2011.

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen inside the Vertical Integration Facility before being rolled out to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

The United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard is seen shortly after the Mobile Service Tower was rolled back, Friday, Aug. 10, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

Jim Chilton, senior vice president for Boeing Space and Launch, left, NASA Administrator Jim Bridenstine, and Tory Bruno, president and CEO of United Launch Alliance are seen walking past a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft launches from Space Launch Complex 41, Friday, Dec. 20, 2019, at Cape Canaveral Air Force Station in Florida. After a successful launch at 6:36 a.m. EST, Boeing’s CST-100 Starliner is in an unplanned, but stable orbit. The team is assessing what test objectives can be achieved before the spacecraft’s return to land in White Sands, New Mexico. Photo Credit: (NASA/Joel Kowsky)

Florida Gov. Ron DeSantis (R), left, Tory Bruno, president and CEO of United Launch Alliance, and NASA Administrator Jim Bridenstine watch as a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onbaord launches from Space Launch Complex 41 at Cape Canaveral Air Force Station, Friday, Dec. 20, 2019, from NASA’s Kennedy Space Center in Florida. The uncrewed Orbital Flight Test launched at 6:36 a.m. EST and is Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

Space Launch Complex 41 is seen illuminated by spotlights, Wednesday, July 29, 2020, ahead of the launch of a United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard from Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

NASA Social participants are reflected in the sunglasses of former NASA astronaut Garrett Reisman, now a senior engineer working on astronaut safety and mission assurance for Space Exploration Technologies, or SpaceX, as he speaks with them, Friday, May 18, 2012, at the launch complex where the company's Falcon 9 rocket is set to launch early Friday morning at Cape Canaveral Air Force Station in Cape Canaveral, Fla. Photo Credit: (NASA/Paul E. Alers)

NASA astronauts Josh Cassada and Suni Williams, who are assigned to fly on the first operational flight of Boeing’s Starliner, are seen during a press conference ahead of the Boeing Orbital Flight Test mission, Thursday, Dec. 19, 2019, at NASA’s Kennedy Space Center in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

NASA astronaut Michael Fincke takes a pictures of a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen as it is rollout out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test with be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen on the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen as it is rolled out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen as it is rollout out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard is seen moments before launch, Sunday, Aug. 12, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test with be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

NASA astronauts Eric Boe, Josh Cassada, Suni Williams, Nicole Mann, and Michael Fincke pose for a picture after a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard was rollout out to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. Mann, Fincke, and Boeing Astronaut Chris Ferguson are assigned to fly on Starliner’s Crew Flight test and Williams and Cassada are assigned to the first operational mission of the spacecraft. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

In this twenty second exposure, a United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen as it launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

A colorful sunrise fills the early morning sky as the United Launch Alliance Atlas V Centaur second stage is transported along the beach road to the Vertical Integration Facility at Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida. The Geostationary Operational Environmental Satellite (GOES-R) will launch aboard the Atlas V rocket in November. GOES-R is the first satellite in a series of next-generation NOAA GOES Satellites.

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41, Wednesday, July 29, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen on the launch pad at Space Launch Complex 41, Wednesday, July 29, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard is seen shortly after the Mobile Service Tower was rolled back, Friday, Aug. 10, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

The United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard is seen shortly after the Mobile Service Tower was rolled back, Friday, Aug. 10, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

An Atlas V rocket with NASA's Juno spacecraft payload is seen the evening before it's planned launch at Space Launch Complex 41 of the Cape Canaveral Air Force Station in Florida on Thursday, August 4, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

In this black and white infrared image, a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. After a successful launch at 6:36 a.m. EST on Dec. 20, Boeing’s CST-100 Starliner is in an unplanned, but stable orbit. The team is assessing what test objectives can be achieved before the spacecraft’s return to land in White Sands, New Mexico. Photo Credit: (NASA/Joel Kowsky)

A radiosonde, an instrument that transmits measurements on atmospheric pressure, humidity, temperature and winds, is prepared for use on a weather balloon at the Cape Canaveral Air Force Station weather station. The data it returns will be used to determine if conditions are acceptable for the launch of NASA's THEMIS mission. THEMIS, an acronym for Time History of Events and Macroscale Interactions during Substorms, consists of five identical probes that will track violent, colorful eruptions near the North Pole. This will be the largest number of scientific satellites NASA has ever launched into orbit aboard a single rocket. The THEMIS mission aims to unravel the mystery behind auroral substorms, an avalanche of magnetic energy powered by the solar wind that intensifies the northern and southern lights. The mission will investigate what causes auroras in the Earth’s atmosphere to dramatically change from slowly shimmering waves of light to wildly shifting streaks of bright color. Launch is planned from Pad 17-B in a window that extends from 6:01 to 6:19 p.m. EST.

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen as it is rollout out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen as it is rolled out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

NASA Deputy Administrator Jim Morhard speaks with Boeing astronaut Chris Ferguson at Space Launch Complex 41 ahead of Boeing’s Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen inside the Vertical Integration Facility before being rolled out to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

Kennedy Space Center Director Bob Cabana delivers opening remarks at a press conference ahead of the Boeing Orbital Flight Test mission, Thursday, Dec. 19, 2019, at NASA’s Kennedy Space Center in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft launches from Space Launch Complex 41, Friday, Dec. 20, 2019, at Cape Canaveral Air Force Station in Florida. After a successful launch at 6:36 a.m. EST, Boeing’s CST-100 Starliner is in an unplanned, but stable orbit. The team is assessing what test objectives can be achieved before the spacecraft’s return to land in White Sands, New Mexico. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A worker releases a weather balloon at the Cape Canaveral Air Force Station weather station. The balloon is equipped with a radiosonde, an instrument that transmits measurements on atmospheric pressure, humidity, temperature and winds as it ascends. The data will be used to determine if conditions are acceptable for the launch of NASA's THEMIS mission. THEMIS, an acronym for Time History of Events and Macroscale Interactions during Substorms, consists of five identical probes that will track violent, colorful eruptions near the North Pole. This will be the largest number of scientific satellites NASA has ever launched into orbit aboard a single rocket. The THEMIS mission aims to unravel the mystery behind auroral substorms, an avalanche of magnetic energy powered by the solar wind that intensifies the northern and southern lights. The mission will investigate what causes auroras in the Earth’s atmosphere to dramatically change from slowly shimmering waves of light to wildly shifting streaks of bright color. Launch is planned from Pad 17-B in a window that extends from 6:01 to 6:19 p.m. EST.

The United Launch Alliance Delta IV Heavy rocket is seen in this long exposure photograph as it launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

CAPE CANAVERAL, Fla. – This memorial message was added to the Atlas V rocket for NASA's Tracking and Data Relay Satellite, or TDRS-L, spacecraft being prepared for launch from Cape Canaveral Air Force Station's Launch Complex 41. Arthur J. "Skip" Mackey Jr. was the “Voice of NASA” during the 1960s, 1970s and early 1980s for flight commentary after liftoff for expendable vehicles launched from Cape Canaveral. Mackey served as branch chief for Telemetry and Communications at Hangar AE in the agency’s Expendable Launch Vehicle Program and then the Launch Services Program for 39 years. He died in Fort Lauderdale, Fla., on Nov. 19, 2013. The TDRS-L spacecraft is the second of three new satellites designed to ensure vital operational continuity for NASA by expanding the lifespan of the Tracking and Data Relay Satellite System TDRSS fleet, which consists of eight satellites in geosynchronous orbit. The spacecraft provide tracking, telemetry, command and high bandwidth data return services for numerous science and human exploration missions orbiting Earth. These include NASA's Hubble Space Telescope and the International Space Station. TDRS-L has a high-performance solar panel designed for more spacecraft power to meet the growing S-band communications requirements. TDRSS is one of NASA Space Communication and Navigation’s SCaN three networks providing space communications to NASA’s missions. For more information more about TDRS-L, visit: http://www.nasa.gov/tdrs To learn more about SCaN, visit: www.nasa.gov/scan For more on "Skip" Mackey go to: http://www.nasa.gov/content/skip-mackey-remembered-by-colleagues-as-voice-of-nasa/ Image credit: United Launch Alliance

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft launches from Space Launch Complex 41, Friday, Dec. 20, 2019, at Cape Canaveral Air Force Station in Florida. After a successful launch at 6:36 a.m. EST, Boeing’s CST-100 Starliner is in an unplanned, but stable orbit. The team is assessing what test objectives can be achieved before the spacecraft’s return to land in White Sands, New Mexico. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft launches from Space Launch Complex 41, Friday, Dec. 20, 2019, at Cape Canaveral Air Force Station in Florida. After a successful launch at 6:36 a.m. EST, Boeing’s CST-100 Starliner is in an unplanned, but stable orbit. The team is assessing what test objectives can be achieved before the spacecraft’s return to land in White Sands, New Mexico. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

The crew access arm is seen after being moved into position for Boeing’s CST-100 Starliner spacecraft atop a United Launch Alliance Atlas V rocket on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test with be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

The L-1011 aircraft carrying a Pegasus XL rocket with NASA's Solar Radiation and Climate Experiment (SORCE) attached takes off from Cape Canaveral Air Force Station, Fla. The L-1011 will release the rocket over the Atlantic Ocean at 39,000 feet. After separation from the rocket, initial contact with the satellite will be made and the mission team will insure that the spacecraft is functioning properly. The SORCE science instruments will then be turned on and their health verified. Approximately 21 days after launch, if all is going well, the instruments will start initial science data collection and calibration will begin. The spacecraft will study the Sun's influence on our Earth and will measure from space how the Sun affects the Earth's ozone layer, atmospheric circulation, clouds, and oceans. This mission is a joint partnership between NASA and the University of Colorado's Laboratory for Atmospheric and Space Physics in Boulder, Colorado.

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft launches from Space Launch Complex 41, Friday, Dec. 20, 2019, at Cape Canaveral Air Force Station in Florida. After a successful launch at 6:36 a.m. EST, Boeing’s CST-100 Starliner is in an unplanned, but stable orbit. The team is assessing what test objectives can be achieved before the spacecraft’s return to land in White Sands, New Mexico. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard is seen shortly after the Mobile Service Tower was rolled back, Friday, Aug. 10, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

The United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard is seen refelcted in water shortly after the Mobile Service Tower was rolled back, Friday, Aug. 10, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

This long exposure photograph shows the Mobile Service Tower being rolled back to reveal the United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard, Friday, Aug. 10, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen on the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Jim Bridenstine, right, and Tory Bruno, president and CEO of United Launch Alliance, are seen as a United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is rolled out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen before being rollout out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

Thomas Zurbuchen, Associate Administrator for NASA's Science Mission Directorate, left, is seen with Tory Bruno, president and CEO of United Launch Alliance, after the rollout of a United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover to the launch pad at Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

Space Launch Complex 41 is seen illuminated by spotlights ahead of the Boeing Starliner Orbital Flight Test mission, Friday, Dec. 20, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch onboard a United Launch Alliance Atlas V rocket on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Charles Bolden walks around the United Launch Alliance Atlas V first stage booster with United Launch Alliance Vice President of Mission operations Jim Sponnick, NASA Mission Manager for Launch Services Wanda Harding, NASA Senior Advisor Mike French, and White House Fellow Debra Kurshan, Wednesday, Sept. 7, 2011, at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. The booster will help send NASA's Mars Science Laboratory Curiosity rover to Mars later this year. Photo Credit: (NASA/Bill Ingalls)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)

After being offloaded from the Mariner transport ship at the Army Wharf at Cape Canaveral Air Force Station in Florida, the United Launch Alliance Atlas V booster for NOAA's Geostationary Operational Environmental Satellite-S (GOES-S) is being transported to the Atlas Spaceflight Operations Center near Space Launch Complex 41 at CCAFS. GOES-S is the second in a series of four advanced geostationary weather satellites. The satellite is slated to launch aboard the Atlas V rocket March 1.

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen on the launch pad at Space Launch Complex 41, Wednesday, July 29, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41, Wednesday, July 29, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

CAPE CANAVERAL, Fla. – This memorial message was added to the Atlas V rocket for NASA's Tracking and Data Relay Satellite, or TDRS-L, spacecraft being prepared for launch from Cape Canaveral Air Force Station's Launch Complex 41. Arthur J. "Skip" Mackey Jr. was the “Voice of NASA” during the 1960s, 1970s and early 1980s for flight commentary after liftoff for expendable vehicles launched from Cape Canaveral. Mackey served as branch chief for Telemetry and Communications at Hangar AE in the agency’s Expendable Launch Vehicle Program and then the Launch Services Program for 39 years. He died in Fort Lauderdale, Fla., on Nov. 19, 2013. The TDRS-L spacecraft is the second of three new satellites designed to ensure vital operational continuity for NASA by expanding the lifespan of the Tracking and Data Relay Satellite System TDRSS fleet, which consists of eight satellites in geosynchronous orbit. The spacecraft provide tracking, telemetry, command and high bandwidth data return services for numerous science and human exploration missions orbiting Earth. These include NASA's Hubble Space Telescope and the International Space Station. TDRS-L has a high-performance solar panel designed for more spacecraft power to meet the growing S-band communications requirements. TDRSS is one of NASA Space Communication and Navigation’s SCaN three networks providing space communications to NASA’s missions. For more information more about TDRS-L, visit: http://www.nasa.gov/tdrs To learn more about SCaN, visit: www.nasa.gov/scan For more on "Skip" Mackey go to: http://www.nasa.gov/content/skip-mackey-remembered-by-colleagues-as-voice-of-nasa/ Image credit: United Launch Alliance

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen illuminated by spotlights on the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test with be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard is seen as it is rollout out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

NASA astronauts Nicole Mann, Michael Fincke, Suni Williams, Josh Cassada, and Eric Boe pose for a picture after a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard was rollout out to the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Wednesday, Dec. 18, 2019 at Cape Canaveral Air Force Station in Florida. Mann, Fincke, and Boeing Astronaut Chris Ferguson are assigned to fly on Starliner’s Crew Flight test, Williams and Cassada are assigned to the first operational mission of the spacecraft, and Boe is the assistant to the chief of the astronaut office for commercial crew. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:26 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen as it is rolled out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

The Mobile Service Tower is rolled back to reveal the United Launch Alliance Delta IV Heavy rocket with the Parker Solar Probe onboard, Saturday, Aug. 11, 2018, Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Jim Bridenstine, NASA Deputy Administrator Jim Morhard, NASA astronaut Barry Wilmore, and Kennedy Space Center Director Bob Cabana, pose for a picture with NASA Social participants in front of a United Launch Alliance Atlas V rocket with Boeing’s CST-100 Starliner spacecraft onboard on the launch pad at Space Launch Complex 41 ahead of the Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape Canaveral Air Force Station in Florida. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

NASA Administrator Charles Bolden, second from left, talks with United Launch Alliance Vice President of Mission operations Jim Sponnick, along with NASA Mission Manager for Launch Services Wanda Harding, left, White House Fellow Debra Kurshan, right, and NASA Senior Advisor Mike French, background, in front of the United Launch Alliance Atlas V first stage booster, Wednesday, Sept. 7, 2011, at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. The booster will help send NASA's Mars Science Laboratory Curiosity rover to Mars later this year. Photo Credit: (NASA/Bill Ingalls)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard is seen as it is rolled out of the Vertical Integration Facility to the launch pad at Space Launch Complex 41, Tuesday, July 28, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Launch is scheduled for Thursday, July 30. Photo Credit: (NASA/Joel Kowsky)

A United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun, Sunday, Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station, Florida. Parker Solar Probe is humanity’s first-ever mission into a part of the Sun’s atmosphere called the corona. Here it will directly explore solar processes that are key to understanding and forecasting space weather events that can impact life on Earth. Photo Credit: (NASA/Bill Ingalls)

Boeing astronaut Chris Ferguson is seen during a press conference ahead of the Boeing Orbital Flight Test mission, Thursday, Dec. 19, 2019, at NASA’s Kennedy Space Center in Florida. Ferguson and NASA astronauts Nicole Mann and Michael Fincke are assigned to fly on Boeing’s Crew Flight Test. The uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

NASA astronaut Nicole Mann answers a question during a press conference ahead of the Boeing Orbital Flight Test mission, Thursday, Dec. 19, 2019, at Cape NASA’s Kennedy Space Center in Florida. Mann, NASA astronaut Michale Fincke, and Boeing astronaut Chris Ferguson are assigned to fly Boeing’s Crew Flight TestThe uncrewed Orbital Flight Test will be Starliner’s maiden mission to the International Space Station for NASA's Commercial Crew Program. The mission, currently targeted for a 6:36 a.m. EST launch on Dec. 20, will serve as an end-to-end test of the system's capabilities. Photo Credit: (NASA/Joel Kowsky)

In this black and white infrared image, a United Launch Alliance Atlas V rocket with NASA’s Mars 2020 Perseverance rover onboard launches from Space Launch Complex 41, Thursday, July 30, 2020, at Cape Canaveral Air Force Station in Florida. The Perseverance rover is part of NASA’s Mars Exploration Program, a long-term effort of robotic exploration of the Red Planet. Photo Credit: (NASA/Joel Kowsky)

An Atlas V rocket launches with the Juno spacecraft payload from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida on Friday, August 5, 2011. The Juno spacecraft will make a five-year, 400-million-mile voyage to Jupiter, orbit the planet, investigate its origin and evolution with eight instruments to probe its internal structure and gravity field, measure water and ammonia in its atmosphere, map its powerful magnetic field and observe its intense auroras. Photo Credit: (NASA/Bill Ingalls)