Aerovironment technicians carefully line up attachments as a fuel cell electrical system is installed on the Helios Prototype solar powered flying wing. The fuel cell system will power the aircraft at night during NASA-sponsored long-endurance demonstration flight in the summer of 2003.

Technicians for AeroVironment, Inc., jack up a pressure tank to the wing of the Helios Prototype solar-electric flying wing. The tank carries pressurized hydrogen to fuel an experimental fuel cell system that powered the aircraft at night during an almost two-day long-endurance flight demonstration in the summer of 2003.

CAPE CANAVERAL, Fla. – In the Space Station Processing Facility at NASA's Kennedy Space Center, workers prepare to install the final solar array wing for the International Space Station onto the S6 truss element. Scheduled to launch on the STS-119 mission, space shuttle Discovery will carry the S6 truss segment to complete the 361-foot-long backbone of the International Space Station. The truss includes the fourth pair of solar array wings and electronics that convert sunlight to power for the orbiting laboratory. Launch is targeted for Feb. 12, 2009. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. – In the Space Station Processing Facility at NASA's Kennedy Space Center, workers prepare to move the final solar array wing for the International Space Station for installation on the S6 truss element. Scheduled to launch on the STS-119 mission, space shuttle Discovery will carry the S6 truss segment to complete the 361-foot-long backbone of the International Space Station. The truss includes the fourth pair of solar array wings and electronics that convert sunlight to power for the orbiting laboratory. Launch is targeted for Feb. 12, 2009. Photo credit: NASA/Troy Cryder

This is a photograph of a technician checking on a solar array wing for the Orbital Workshop as it is deployed. A solar array, consisting of two wings covered on one side with solar cells, was mounted outside the workshop to generate electrical power to augment the power generated by another solar array mounted on the solar observatory.

Technician Marshall MacCready carefully lays a panel of solar cells into place on a wing section of the Helios Prototype flying wing at AeroVironment's Design Development Center in Simi Valley, California. The bi-facial cells, manufactured by SunPower, Inc., of Sunnyvale, California, are among 64,000 solar cells which have been installed on the solar-powered aircraft to provide electricity to its 14 motors and operating systems.

Technician Marshall MacCready carefully lays a panel of solar cells into place on a wing section of the Helios Prototype flying wing at AeroVironment's Design Development Center in Simi Valley, California. More than 1,800 panels containing some 64,000 bi-facial cells, fabricated by SunPower, Inc., of Sunnyvale, California, have been installed on the solar-powered aircraft to provide electricity to its 14 motors and operating systems.

The Pathfinder research aircraft's solar cell arrays are prominently displayed as it touches down on the bed of Rogers Dry Lake at the Dryden Flight Research Center, Edwards, California, following a test flight. The solar arrays covered more than 75 percent of Pathfinder's upper wing surface, and provided electricity to power its six electric motors, flight controls, communications links and a host of scientific sensors.

This is a view of a solar cell blanket deployed on a water table during the Solar Array deployment test. The Hubble Space Telescope (HST) Solar Arrays provide power to the spacecraft. The arrays are mounted on opposite sides of the HST, on the forward shell of the Support Systems Module. Each array stands on a 4-foot mast that supports a retractable wing of solar panels 40-feet (12.1-meters) long and 8.2-feet (2.5-meters) wide, in full extension. The arrays rotate so that the solar cells face the Sun as much as possible to harness the Sun's energy. The Space Telescope Operations Control Center at the Goddard Space Center operates the array, extending the panels and maneuvering the spacecraft to focus maximum sunlight on the arrays. The purpose of the HST, the most complex and sensitive optical telescope ever made, is to study the cosmos from a low-Earth orbit. By placing the telescope in space, astronomers are able to collect data that is free of the Earth's atmosphere. The HST Solar Array was designed by the European Space Agency and built by British Aerospace. The Marshall Space Flight Center had overall responsibility for design, development, and construction of the HST.

This cutaway illustration shows the characteristics and basic elements of the Skylab Orbiter Workshop (OWS). The OWS was divided into two major compartments. The lower level provided crew accommodations for sleeping, food preparation and consumption, hygiene, waste processing and disposal, and performance of certain experiments. The upper level consisted of a large work area and housed water storage tanks, a food freezer, storage vaults for film, scientific airlocks, mobility and stability experiment equipment, and other experimental equipment. The compartment below the crew quarters was a container for liquid and solid waste and trash accumulated throughout the mission. A solar array, consisting of two wings covered on one side with solar cells, was mounted outside the workshop to generate electrical power to augment the power generated by another solar array mounted on the solar observatory. Thrusters were provided at one end of the workshop for short-term control of the attitude of the space station.

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Crews with NASA and Lockheed Martin pose for a photo in front of NASA’s Artemis II Orion spacecraft inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. Technicians operated a 30-ton crane to move the spacecraft from  the Final Assembly and System Testing cell to prepare for upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign.

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Rebekah Tolatovicz, a technician with Lockheed Martin, operates a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Technicians with NASA and Lockheed Martin operate a 30-ton crane to move NASA’s Artemis II Orion spacecraft out of the Final Assembly and System Testing cell inside the Neil A. Operations and Checkout Building at NASA’s Kennedy Space Center in Florida on Saturday, Feb. 22, 2025. The move prepares for the upcoming installation of four solar array wings and spacecraft adapter jettison fairings for the agency’s first crewed flight test under the Artemis campaign. 

Fairchild technicians check out the extended Pegasus meteoroid detection surface. The Pegasus was developed by Fairchild Stratos Corporation, Hagerstown, Maryland, for NASA through the Marshall Space Flight Center. Three Pegasus satellites were flown aboard Saturn I SA-8, SA-9, and SA-10 missions. After being placed into orbit around the Earth, the satellite unfolded a series of giant panels to form a pair of wings measuring 96 feet across. The purpose of the satellite was to electronically record the size and frequency of particles in space, and compare the performance of protected and unprotected solar cells as important new preliminaries to a marned flight to the Moon.

NASA's Helios Prototype aircraft taking off from the Pacific Missile Range Facility, Kauai, Hawaii, for the record flight. As a follow-on to the Centurion (and earlier Pathfinder and Pathfinder-Plus) aircraft, the solar-powered Helios Prototype is the latest and largest example of a slow-flying ultralight flying wing designed for long-duration, high-altitude Earth science or telecommunications relay missions in the stratosphere. Developed by AeroVironment, Inc., of Monrovia, California, under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) project, the unique craft is intended to demonstrate two key missions: the ability to reach and sustain horizontal flight at 100,000 feet altitude on a single-day flight in 2001, and to maintain flight above 50,000 feet altitude for at least four days in 2003, with the aid of a regenerative fuel cell-based energy storage system now in development. Both of these missions will be powered by electricity derived from non-polluting solar energy. The Helios Prototype is an enlarged version of the Centurion flying wing, which flew a series of test flights at NASA's Dryden Flight Research Center in late 1998. The craft has a wingspan of 247 feet, 41 feet greater than the Centurion, 2 1/2 times that of its solar-powered Pathfinder flying wing, and longer than the wingspans of either the Boeing 747 jetliner or Lockheed C-5 transport aircraft. The remotely piloted, electrically powered Helios Prototype went aloft on its maiden low-altitude checkout flight Sept. 8, 1999, over Rogers Dry Lake adjacent to NASA's Dryden Flight Research Center in the Southern California desert. The initial flight series was flown on battery power as a risk-reduction measure. In all, six flights were flown in the Helios Protoype's initial development series. In upgrading the Centurion to the Helios Prototype configuration, AeroVironment added a sixth wing section and a fifth landing gear pod, among other improvements. The additional wingsp

After its launch on May 14, 1973, it was immediately known that there were some major problems with Skylab. The large, delicate, meteoroid shield on the outside of the workshop was ripped off by the vibration of the launch. Its tearing off caused serious damage to the two wings of solar cells that were to supply most of the electric power to the workshop. Once in orbit, the news worsened. The loss of the big shade exposed the metal skin of the workshop to the sun. Internal temperatures soared to 126 degrees F. This heat not only threatened its habitation by astronauts, but if prolonged, would cause serious damage to instruments and film. After twice delaying the launch of the first astronaut crew, engineers worked frantically to develop solutions to these problems and salvage the Skylab. After designing a protective solar sail to cover the workshop, crews needed to practice using the specially designed tools and materials to facilitate the repair procedure. Marshall Space Flight Center's Neutral Buoyancy Simulator (NBS), was used to practice these maneuvers. Pictured here are the astronauts in the NBS deploying the protecticve solar sail. On may 25, 1973, an Apollo command and service module was launched and later docked with Skylab. The next day, astronauts Conrad and Kerwin were able to complete the needed repairs to Skylab, salvaging the entire program.

CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, space shuttle Discovery is revealed after the rotating service structure has been rolled back. The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, the orbiter access arm and White Room are extended toward space shuttle Discovery after rollback of the rotating service structure. The White Room provides crew access into the shuttle. The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

Engineers at NASA's Jet Propulsion Laboratory in Southern California examine one of Psyche's solar arrays during a deployment test in the Lab's High Bay 2 clean room in late February 2022. The twin arrays are together about 800 square feet (75 square meters) – the largest ever deployed at JPL. Part of a solar electric propulsion system provided by Maxar Technologies, they will power the spacecraft on its 1.5 billion-mile (2.4 billion-kilometer) journey to the large, metal-rich asteroid Psyche. Only the three center panels on each five-panel, cross-shaped array can be deployed at JPL due to the limitations of the gravity-offload fixture and the opposing direction of rotation of the cross panels. Deployment of the two cross panels was previously performed at Maxar with different equipment. After further spacecraft testing is completed at JPL, the arrays will be removed and returned to Maxar in order to repeat the cross-panel deployments, make any final repairs to the solar cells, and test overall performance. The arrays then get shipped from Maxar to NASA's Kennedy Space Center in Florida, where they will be reintegrated onto the spacecraft in preparation for launch in August 2022. About an hour after launch, Psyche will deploy the arrays sequentially, first unfolding the three lengthwise center panels, then the two cross panels on one wing before repeating the process with the other wing. Each array takes about 7 ½ minutes to unfurl and latch into place. Each array is 37.1 feet (11.3 meters) long and 24 feet (7.3 meters) wide when fully deployed. With arrays deployed on either side of the chassis, the spacecraft is about the size of a singles tennis court: 81 feet long (24.7 meters) and 24 feet (7.3 meters) wide. https://photojournal.jpl.nasa.gov/catalog/PIA25134

An engineer at NASA's Jet Propulsion Laboratory in Southern California examines a panel on Psyche's stowed solar arrays prior to a deployment test in the Lab's High Bay 2 clean room in February 2022. The twin arrays are together about 800 square feet (75 square meters) – the largest ever deployed at JPL. Part of a solar electric propulsion system provided by Maxar Technologies, they will power the spacecraft on its 1.5 billion-mile (2.4 billion-kilometer) journey to the large, metal-rich asteroid Psyche. Only the three center panels on each five-panel, cross-shaped array can be deployed at JPL due to the limitations of the gravity-offload fixture and the opposing direction of rotation of the cross panels. Deployment of the two cross panels was previously performed at Maxar with different equipment. After further spacecraft testing is completed at JPL, the arrays will be removed and returned to Maxar in order to repeat the cross-panel deployments, make any final repairs to the solar cells, and test overall performance. The arrays then get shipped from Maxar to NASA's Kennedy Space Center in Florida, where they will be reintegrated onto the spacecraft in preparation for launch in August 2022. About an hour after launch, Psyche will deploy the arrays sequentially, first unfolding the three lengthwise center panels, then the two cross panels on one wing before repeating the process with the other wing. Each array takes about 7 ½ minutes to unfurl and latch into place. Each array is 37.1 feet (11.3 meters) long and 24 feet (7.3 meters) wide when fully deployed. With arrays deployed on either side of the chassis, the spacecraft is about the size of a singles tennis court: 81 feet long (24.7 meters) and 24 feet (7.3 meters) wide. https://photojournal.jpl.nasa.gov/catalog/PIA25133

Engineers at NASA's Jet Propulsion Laboratory in Southern California successfully deployed a solar array installed on the agency's Psyche spacecraft. It was one of two deployed during testing in the Lab's High Bay 2 clean room in late February 2022. The twin arrays are together about 800 square feet (75 square meters) – the largest ever deployed at JPL. Part of a solar electric propulsion system provided by Maxar Technologies, they will power the spacecraft on its 1.5 billion-mile (2.4 billion-kilometer) journey to the large, metal-rich asteroid Psyche. Only the three center panels on each five-panel, cross-shaped array can be deployed at JPL due to the limitations of the gravity-offload fixture and the opposing direction of rotation of the cross panels. Deployment of the two cross panels was previously performed at Maxar with different equipment. After further spacecraft testing is completed at JPL, the arrays will be removed and returned to Maxar in order to repeat the cross-panel deployments, make any final repairs to the solar cells, and test overall performance. The arrays then get shipped from Maxar to NASA's Kennedy Space Center in Florida, where they will be reintegrated onto the spacecraft in preparation for launch in August 2022. About an hour after launch, Psyche will deploy the arrays sequentially, first unfolding the three lengthwise center panels, then the two cross panels on one wing before repeating the process with the other wing. Each array takes about 7 ½ minutes to unfurl and latch into place. Each array is 37.1 feet (11.3 meters) long and 24 feet (7.3 meters) wide when fully deployed. With arrays deployed on either side of the chassis, the spacecraft is about the size of a singles tennis court: 81 feet long (24.7 meters) and 24 feet (7.3 meters) wide. https://photojournal.jpl.nasa.gov/catalog/PIA25135

Engineers at NASA's Jet Propulsion Laboratory in Southern California examine one of Psyche's stowed solar arrays prior to a deployment test in the Lab's High Bay 2 clean room in late February 2022. The twin arrays are together about 800 square feet (75 square meters) – the largest ever deployed at JPL. Part of a solar electric propulsion system provided by Maxar Technologies, they will power the spacecraft on its 1.5 billion-mile (2.4 billion-kilometer) journey to the large, metal-rich asteroid Psyche. Only the three center panels on each five-panel, cross-shaped array can be deployed at JPL due to the limitations of the gravity-offload fixture and the opposing direction of rotation of the cross panels. Deployment of the two cross panels was previously performed at Maxar with different equipment. After further spacecraft testing is completed at JPL, the arrays will be removed and returned to Maxar in order to repeat the cross-panel deployments, make any final repairs to the solar cells, and test overall performance. The arrays then get shipped from Maxar to NASA's Kennedy Space Center in Florida, where they will be reintegrated onto the spacecraft in preparation for launch in August 2022. About an hour after launch, Psyche will deploy the arrays sequentially, first unfolding the three lengthwise center panels, then the two cross panels on one wing before repeating the process with the other wing. Each array takes about 7 ½ minutes to unfurl and latch into place. Each array is 37.1 feet (11.3 meters) long and 24 feet (7.3 meters) wide when fully deployed. With arrays deployed on either side of the chassis, the spacecraft is about the size of a singles tennis court: 81 feet long (24.7 meters) and 24 feet (7.3 meters) wide. https://photojournal.jpl.nasa.gov/catalog/PIA25132

The first flight of a large aircraft to be powered by electric fuel cells began with a takeoff at 8:43 a.m. HST today from the Hawaiian island of Kauai. The Helios Prototype flying wing, built by AeroVironment, Inc., of Monrovia, Calif., as part of NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program, used solar panels to power its 10 electric motors for takeoff and during daylight portions of its planned 20-hour shakedown flight. As sunlight diminishes, Helios will switch to a fuel cell system to continue flight into the night. The takeoff set the stage for a two-day Helios endurance flight in the stratosphere planned for mid-July. The Helios wing, spanning 247 feet and weighing about 2,400 pounds, is giving NASA and industry engineers confidence that remotely piloted aircraft will be able to stay aloft for weeks at a time, providing environmental monitoring capabilities and telecommunications relay services. Helios is an all-electric airplane. In addition to being non-polluting, Helios can fly above storms, and use the power of the sun to stay aloft during daylight. Key to the success of this type of aircraft is the ability to fly in darkness, using fuel cells when sunlight cannot furnish energy. Helios flew over the Navy's Pacific Missile Range Facility where favorable sun exposure and test ranges closed to other air traffic benefited the NASA research effort. In 2003 the aircraft was lost to a crash.

The first flight of a large aircraft to be powered by electric fuel cells began with a takeoff at 8:43 a.m. HST today from the Hawaiian island of Kauai. The Helios Prototype flying wing, built by AeroVironment, Inc., of Monrovia, Calif., as part of NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program, used solar panels to power its 10 electric motors for takeoff and during daylight portions of its planned 20-hour shakedown flight. As sunlight diminishes, Helios will switch to a fuel cell system to continue flight into the night. The takeoff set the stage for a two-day Helios endurance flight in the stratosphere planned for mid-July. The Helios wing, spanning 247 feet and weighing about 2,400 pounds, is giving NASA and industry engineers confidence that remotely piloted aircraft will be able to stay aloft for weeks at a time, providing environmental monitoring capabilities and telecommunications relay services. Helios is an all-electric airplane. In addition to being non-polluting, Helios can fly above storms, and use the power of the sun to stay aloft during daylight. Key to the success of this type of aircraft is the ability to fly in darkness, using fuel cells when sunlight cannot furnish energy. Helios flew over the Navy's Pacific Missile Range Facility where favorable sun exposure and test ranges closed to other air traffic benefited the NASA research effort. In 2003 the aircraft was lost to a crash.

The first flight of a large aircraft to be powered by electric fuel cells began with a takeoff at 8:43 a.m. HST today from the Hawaiian island of Kauai. The Helios Prototype flying wing, built by AeroVironment, Inc., of Monrovia, Calif., as part of NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program, used solar panels to power its 10 electric motors for takeoff and during daylight portions of its planned 20-hour shakedown flight. As sunlight diminishes, Helios will switch to a fuel cell system to continue flight into the night. The takeoff set the stage for a two-day Helios endurance flight in the stratosphere planned for mid-July. The Helios wing, spanning 247 feet and weighing about 2,400 pounds, gave NASA and industry engineers confidence that remotely piloted aircraft would be able to stay aloft for weeks at a time, providing environmental monitoring capabilities and telecommunications relay services. Helios was an all-electric airplane. In addition to being non-polluting, Helios flew above storms, and used the power of the sun to stay aloft during daylight. Key to the success of this type of aircraft was the ability to fly in darkness, using fuel cells when sunlight cannot furnish energy. Helios flew over the Navy's Pacific Missile Range Facility where favorable sun exposure and test ranges closed to other air traffic benefited the NASA research effort. In 2003 the aircraft was lost to a crash.

The first flight of a large aircraft to be powered by electric fuel cells began with a takeoff at 8:43 a.m. HST today from the Hawaiian island of Kauai. The Helios Prototype flying wing, built by AeroVironment, Inc., of Monrovia, Calif., as part of NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program, used solar panels to power its 10 electric motors for takeoff and during daylight portions of its planned 20-hour shakedown flight. As sunlight diminishes, Helios will switch to a fuel cell system to continue flight into the night. The takeoff set the stage for a two-day Helios endurance flight in the stratosphere planned for mid-July. The Helios wing, spanning 247 feet and weighing about 2,400 pounds, is giving NASA and industry engineers confidence that remotely piloted aircraft will be able to stay aloft for weeks at a time, providing environmental monitoring capabilities and telecommunications relay services. Helios is an all-electric airplane. In addition to being non-polluting, Helios can fly above storms, and use the power of the sun to stay aloft during daylight. Key to the success of this type of aircraft is the ability to fly in darkness, using fuel cells when sunlight cannot furnish energy. Helios flew over the Navy's Pacific Missile Range Facility where favorable sun exposure and test ranges closed to other air traffic benefited the NASA research effort. In 2003 the aircraft was lost to a crash.

The first flight of a large aircraft to be powered by electric fuel cells began with a takeoff at 8:43 a.m. HST today from the Hawaiian island of Kauai. The Helios Prototype flying wing, built by AeroVironment, Inc., of Monrovia, Calif., as part of NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program, used solar panels to power its 10 electric motors for takeoff and during daylight portions of its planned 20-hour shakedown flight. As sunlight diminishes, Helios will switch to a fuel cell system to continue flight into the night. The takeoff set the stage for a two-day Helios endurance flight in the stratosphere planned for mid-July. The Helios wing, spanning 247 feet and weighing about 2,400 pounds, is giving NASA and industry engineers confidence that remotely piloted aircraft will be able to stay aloft for weeks at a time, providing environmental monitoring capabilities and telecommunications relay services. Helios is an all-electric airplane. In addition to being non-polluting, Helios can fly above storms, and use the power of the sun to stay aloft during daylight. Key to the success of this type of aircraft is the ability to fly in darkness, using fuel cells when sunlight cannot furnish energy. Helios flew over the Navy's Pacific Missile Range Facility where favorable sun exposure and test ranges closed to other air traffic benefited the NASA research effort. In 2003 the aircraft was lost to a crash.

CAPE CANAVERAL, Fla. – Lights bathe space shuttle Discovery on Launch Pad 39A at NASA's Kennedy Space Center in Florida after rollback of the rotating service structure. The orbiter access arm and White Room are extended toward Discovery. The White Room provides crew access into the shuttle. Above the external tank is the oxygen vent hood, called the "beanie cap." The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, the orbiter access arm and White Room are extended toward space shuttle Discovery after rollback of the rotating service structure. Above the external tank is the oxygen vent hood, called the "beanie cap." The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Lights around Launch Pad 39A at NASA's Kennedy Space Center in Florida bathe space shuttle Discovery on Launch Pad 39A at NASA's Kennedy Space Center in Florida after rollback of the rotating service structure. The orbiter access arm and White Room are extended toward Discovery. The White Room provides crew access into the shuttle. Above the external tank is the oxygen vent hood, called the "beanie cap." The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, the orbiter access arm and White Room are extended toward space shuttle Discovery after rollback of the rotating service structure. The White Room provides crew access into the shuttle. Above the external tank is the oxygen vent hood, called the "beanie cap." The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, the orbiter access arm and White Room are extended toward space shuttle Discovery after rollback of the rotating service structure. The White Room provides crew access into the shuttle. Above the external tank is the oxygen vent hood, called the "beanie cap." The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Under a full moon on Launch Pad 39A at NASA's Kennedy Space Center in Florida, space shuttle Discovery is revealed after the rotating service structure has been rolled back. The rollback is in preparation for Discovery's liftoff on the STS-119 mission with a crew of seven. The rotating structure provides protected access to the shuttle for changeout and servicing of payloads at the pad. It is supported by a rotating bridge that pivots on a vertical axis on the west side of the pad's flame trench. After the RSS is rolled back, the orbiter is ready for fuel cell activation and external tank cryogenic propellant loading operations. The mission is the 28th to the International Space Station and the 125th space shuttle flight. Discovery will deliver the final pair of power-generating solar array wings and the S6 truss segment. Installation of S6 will signal the station's readiness to house a six-member crew for conducting increased science. Liftoff of Discovery is scheduled for 9:20 p.m. EDT on March 11. Photo courtesy of NASA/Bill Ingalls

Technicians at NASA’s Kennedy Space Center in Florida working to install an adapter that will connect the Orion spacecraft to its rocket for the Artemis I mission around the Moon on Aug. 10, 2020. This is one of the final major hardware operations for Orion inside the Neil Armstrong Operations and Checkout Building prior to integration with the Space Launch System (SLS) rocket...The spacecraft adapter cone (seen at the bottom of the stack pictured above) connects to the bottom of Orion’s service module and will later join another adapter connected to the top of the rocket’s interim cryogenic propulsion stage (ICPS). During the process to install the cone on Orion, the spacecraft is lifted out of the Final Assembly and Systems Testing, or FAST, cell and placed into the Super Station support fixture...During flight, the SLS rocket separates in multiple stages as it pushes Orion into deep space. After accelerating Orion towards the Moon, the spacecraft will separate from the ICPS and adapter cone using pyrotechnics and springs...Next up before stacking Orion on the rocket, technicians will install coverings to protect fluid lines and electrical components on the crew module adapter that connects Orion to the service module. Workers also will install the solar array wings that will provide Orion with power, spacecraft adapter jettison fairings that enclose the service module for launch, and the forward bay cover that protects the parachute system. ..Orion will fly on the agency’s Artemis I mission – the first in a series of increasingly complex missions to the Moon that will lead to human exploration of Mars.

Technicians at NASA’s Kennedy Space Center in Florida are working to install an adapter that will connect the Orion spacecraft to its rocket for the Artemis I mission around the Moon. This is one of the final major hardware operations for Orion inside the Neil Armstrong Operations and Checkout Building prior to integration with the Space Launch System (SLS) rocket...The spacecraft adapter cone (seen at the bottom of the stack pictured above) connects to the bottom of Orion’s service module and will later join another adapter connected to the top of the rocket’s interim cryogenic propulsion stage (ICPS). During the process to install the cone on Orion, the spacecraft is lifted out of the Final Assembly and Systems Testing, or FAST, cell and placed into the Super Station support fixture...During flight, the SLS rocket separates in multiple stages as it pushes Orion into deep space. After accelerating Orion towards the Moon, the spacecraft will separate from the ICPS and adapter cone using pyrotechnics and springs...Next up before stacking Orion on the rocket, technicians will install coverings to protect fluid lines and electrical components on the crew module adapter that connects Orion to the service module. Workers also will install the solar array wings that will provide Orion with power, spacecraft adapter jettison fairings that enclose the service module for launch, and the forward bay cover that protects the parachute system. ..Orion will fly on the agency’s Artemis I mission – the first in a series of increasingly complex missions to the Moon that will lead to human exploration of Mars. Through the Artemis program, NASA is working to land the first woman and the next man on the Moon by 2024