S125-E-012739 (20 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, uses a computer on the middeck of the Earth-orbiting Space Shuttle Atlantis during flight day 10 activities.

STS-125 Mission Specialist Mike Massimino makes comments about the STS-125 mission to the Hubble Space Telescope during a visit by the crew to the Embassy of Italy in Washington, Thursday, July 23, 2009. Photo Credit: (NASA/Bill Ingalls)

Giovanni Castellaneta, Ambassador of Italy, left, shakes hands with STS-125 Mission Specialist Mike Massimino during a visit by the crew of STS-125 to the Embassy of Italy in Washington, Thursday, July 23, 2009. Photo Credit: (NASA/Bill Ingalls)

STS-125 Mission Specialist Mike Massimino, left, an American of Italian descent, makes comments about the STS-125 mission to the Hubble Space Telescope during a visit by the crew to the Embassy of Italy in Washington, Thursday, July 23, 2009. Photo Credit: (NASA/Bill Ingalls)

S125-E-012138 (19 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, looks through a window on the aft flight deck of the Earth-orbiting Space Shuttle Atlantis.

Former NASA astronaut Mike Massimino participates in a panel discussion titled "The Big Picture", Saturday, Aug. 5, 2017 at the Intrepid Sea, Air & Space Museum in New York City. Photo Credit: (NASA/Bill Ingalls)

Former NASA astronaut Mike Massimino participates in a panel discussion titled "The Big Picture", Saturday, Aug. 5, 2017 at the Intrepid Sea, Air & Space Museum in New York City. Photo Credit: (NASA/Bill Ingalls)

S125-E-012506 (19 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, occupies the commander?s station on the flight deck of the Earth-orbiting Space Shuttle Atlantis during flight day nine activities. Earth?s horizon and the blackness of space are visible through the windows.

NASA Astronaut Mike Massimino, known as "Astro_Mike" on Twitter, prepares to give a presentation with fellow STS-125 shuttle mission crew members at the NASA Tweetup event held at NASA Headquarters, July 21, 2009 in Washington. Nearly 200 of NASA’s Twitter followers are in attendance. Photo Credit: (Carla Cioffi)

NASA Astronaut Mike Massimino, known as "Astro_Mike" on Twitter, answers a question during a presentation with fellow STS-125 shuttle mission crew members at the NASA Tweetup event held at NASA Headquarters, July 21, 2009 in Washington. Nearly 200 of NASA’s Twitter followers are in attendance. Photo Credit: (Carla Cioffi)

Astronauts from the STS-125 mission to repair the Hubble Space Telescope shared accounts of their mission today at StenniSphere. The crewmembers-Commander Scott Altman, Pilot Greg Johnson and Mission Specialists Megan McArthur, Michael Good, Drew Feustel and Mike Massimino-thanked Stennis employees for their contributions to the success of the mission and presented a plaque to Marina Benigno, director of center operations. Pictured are (l to r) Massimino, Good, Feustel, Altman, McArthur and Johnson.

The annual Dr. Wernher Von Braun Memorial Dinner was held at the U.S. Space and Rocket Center's Davidson Center on October 26, 2017 with Keynote speaker General John Hyten, Commander of U.S. Strategic Command. Emcee was Mark Larson of Mark Larson Media Services, Inc. Dr. Wernher Von Braun Memorial Scholarships were presented to 8 college students by the National Space Club. Educator of the Year was awarded to Tammy Thorpe; Community Service award was presented to Huntsville, Al. Mayor Tommy Battle. The Communications Award was presented to retired astronaut Dr. Mike Massimino. The Distinguished Science Award was presented to Dr. Martin Weisskopf. The Astronautics Engineer Award was presented to Douglas R. Cooke. The Dr. Wernher Von Braun Space Flight Trophy was presented to Robert Lightfoot.

NASA Acting Chief Technologist Douglas Terrier, left, moderates a panel discussion titled "The Big Picture" with NASA James Webb Space Telescope systems engineer Mike Menzel, SpaceX Director of space operations and former NASA astronaut Garret Reisman, Honeybee Robotics co-founder and chairman Stephen Gorevan, and former NASA astronaut Mike Massimino, Saturday, Aug. 5, 2017 at the Intrepid Sea, Air & Space Museum in New York City. Photo Credit: (NASA/Bill Ingalls)

NASA astronaut Mike Massimino, left, and Sesame Street's Elmo speak at the STS-135 Tweetup, Thursday, July 7, 2011, at Kennedy Space Center in Cape Canaveral, Fla. Elmo asked the astronauts questions about living and working in space. About 150 NASA Twitter followers attended the event. The STS-135 mission will be NASA's last space shuttle launch. Photo Credit: (NASA/Paul E. Alers)

Mike Massimino, NASA Astronaut, known on twitter as @Astro_Mike, speaks during a two-day NASA Tweetup event held at NASA's Kennedy Space Center in Cape Canaveral, Fla, Sunday, Nov. 15, 2009. NASA Twitter followers in attendance will have the opportunity to take a tour of NASA's Kennedy Space Center, view the STS-129 space shuttle launch and speak with shuttle technicians, engineers, astronauts and managers. Photo Credit: (NASA/Carla Cioffi)

Astronauts Mike Massimino, top center, and Alvin Drew, top right, sign autographs at the NASA booth set up on the National Mall as part of the National Day of Service, Saturday, January 19, 2013, in Washington. NASA along with other federal agencies set up along the Mall as part of events surrounding the inauguration of President Barack Obama. Photo Credit: (NASA/Carla Cioffi)

Astronauts Mike Massimino, left, and Alvin Drew sign autographs at the NASA booth set up on the National Mall as part of the National Day of Service, Saturday, January 19, 2013, in Washington. NASA along with other federal agencies set up along the Mall as part of events surrounding the inauguration of President Barack Obama. Photo Credit: (NASA/Carla Cioffi)

Astronauts Mike Massimino, left, and Alvin Drew pose for the camera at the NASA booth set up on the National Mall as part of the National Day of Service, Saturday, January 19, 2013, in Washington. NASA along with other federal agencies set up along the Mall as part of events surrounding the inauguration of President Barack Obama. Photo Credit: (NASA/Carla Cioffi)

S125-E-009232 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, is pictured as he peers through a window on the aft flight deck of the Earth-orbiting Space Shuttle Atlantis during the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Massimino and astronaut Michael Good (background), mission specialist, continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

NASA astronaut Mike Massimino, far left, Sesame Street's Elmo and NASA astronaut Doug Wheelock, far right, speak at the STS-135 Tweetup, Thursday, July 7, 2011, at Kennedy Space Center in Cape Canaveral, Fla. Elmo asked the astronauts questions about living and working in space. About 150 NASA Twitter followers attended the event. The STS-135 mission will be NASA's last space shuttle launch. Photo Credit: (NASA/Paul E. Alers)

The annual Dr. Wernher Von Braun Memorial Dinner was held at the U.S. Space and Rocket Center's Davidson Center on October 26, 2017 with Keynote speaker General John Hyten, Commander of U.S. Strategic Command. Emcee was Mark Larson of Mark Larson Media Services, Inc. Dr. Wernher Von Braun Memorial Scholarships were presented to 8 college students by the National Space Club. Educator of the Year was awarded to Tammy Thorpe; Community Service award was presented to Huntsville, Al. Mayor Tommy Battle. The Communications Award was presented to retired astronaut Dr. Mike Massimino. The Distinguished Science Award was presented to Dr. Martin Weisskopf. The Astronautics Engineer Award was presented to Douglas R. Cooke. The Dr. Wernher Von Braun Space Flight Trophy was presented to Robert Lightfoot.

Italian Ambassador Giovanni Castellaneta, second from left, is presented with a montage by STS-125 Mission Specialist Mike Massimino, second from right, during a visit by the crew of STS-125 to the Embassy of Italy in Washington, Thursday, July 23, 2009. Other crew members, from left are Mission Specialists, Michael Good, Megan McArthur, John Grunsfeld, Commander Scott Altman and Andrew Feustel, far right. Photo Credit: (NASA/Bill Ingalls)

JSC2001-02670 (November 2001) --- Astronaut Michael J. Massimino, mission specialist.

The annual Dr. Wernher Von Braun Memorial Dinner was held at the U.S. Space and Rocket Center's Davidson Center on October 26, 2017 with Keynote speaker General John Hyten, Commander of U.S. Strategic Command. Emcee was Mark Larson of Mark Larson Media Services, Inc. Dr. Wernher Von Braun Memorial Scholarships were presented to 8 college students by the National Space Club. Educator of the Year was awarded to Tammy Thorpe; Community Service award was presented to Huntsville, Al. Mayor Tommy Battle. The Communications Award was presented to retired astronaut Dr. Mike Massimino. The Distinguished Science Award was presented to Dr. Martin Weisskopf. The Astronautics Engineer Award was presented to Douglas R. Cooke. The Dr. Wernher Von Braun Space Flight Trophy was presented to Robert Lightfoot.

NASA Deputy Associate Administrator Melanie Saunders and former NASA astronaut Mike Massimino ring the closing bell of the Nasdaq after the NASA's InSight lander successfully touched down on the surface of Mars, Monday, Nov. 26, 2018 at the Nasdaq MarketSite in New York City. The lander sent a signal affirming a completed landing sequence at approximately 3 p.m. EST (noon PST) after touching down on the western side of a flat, smooth expanse of lava called Elysium Planitila. InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a Mars lander designed to study the "inner space" of Mars: its crust, mantle, and core. Photo Credit: (NASA/Joel Kowsky)

NASA Deputy Associate Administrator Melanie Saunders and former NASA astronaut Mike Massimino ring the closing bell of the Nasdaq after the NASA's InSight lander successfully touched down on the surface of Mars, Monday, Nov. 26, 2018 at the Nasdaq MarketSite in New York City. The lander sent a signal affirming a completed landing sequence at approximately 3 p.m. EST (noon PST) after touching down on the western side of a flat, smooth expanse of lava called Elysium Planitila. InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a Mars lander designed to study the "inner space" of Mars: its crust, mantle, and core. Photo Credit: (NASA/Joel Kowsky)

S125-E-007532 (15 May 2009) --- Astronaut Mike Massimino in Atlantis' cargo bay works with the Hubble Space Telescope.

JSC2008-E-097094 (1 Aug. 2008) --- Astronaut Mike Massimino, STS-125 mission specialist, practices repairing Hubble Space Telescope hardware during a training session at NASA's Johnson Space Center.

S125-E-007031 (13 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, looks through an overhead window on the aft flight deck of Space Shuttle Atlantis during flight day three activities.

S125-E-006650 (13 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, is pictured on the flight deck of Space Shuttle Atlantis during flight day three activities.

JSC2009-E-087212 (23 April 2009) --- Astronauts Mike Massimino (left) and Andrew Feustel, both STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

S125-E-007339 (14 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, looks over procedures checklists on the aft flight deck of Space Shuttle Atlantis during flight day four activities.

S125-E-006509 (12 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, uses a computer on the middeck of the Earth-orbiting Space Shuttle Atlantis during flight day two activities.

S125-E-006592 (12 May 2009) --- Astronauts Megan McArthur, Mike Massimino (center) and Andrew Feustel, all STS-125 mission specialists, prepare to eat a meal on the middeck of the Earth-orbiting Space Shuttle Atlantis.

JSC2001-E-44739 (December 2001) --- Astronaut Michael J. Massimino, STS-109 mission specialist, dons a training version of the Extravehicular Mobility Unit (EMU) space suit prior to a mission training session in the Environmental Test Article (ETA) Chamber in the Crew Systems Laboratory at Johnson Space Center (JSC).

JSC2008-E-141528 (6 Nov. 2008) --- Astronaut Mike Massimino, STS-125 mission specialist, gets help with final touches in the donning of a training version of his Extravehicular Mobility Unit (EMU) spacesuit prior to being submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Astronaut John Grunsfeld, mission specialist, assisted Massimino.

S125-E-008728 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, participates in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Massimino and astronaut Michael Good (out of frame), mission specialist, continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

S125-E-008651 (17 May 2009) --- Astronauts Michael Good (bottom) and Mike Massimino, both STS-125 mission specialists, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Massimino and Good continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

S125-E-007537 (15 May 2009) --- Astronaut Mike Massimino works with the Hubble Space Telescope in the cargo bay of the Earth-orbiting Space Shuttle Atlantis. Astronauts Massimino and Michael Good (out of frame) participated in the second session of STS-125 extravehicular activity -- as part of a five-day beehive-like agenda of spacewalking and work on the giant orbital observatory.

S125-E-008656 (17 May 2009) --- Astronauts Michael Good (left) and Mike Massimino, both STS-125 mission specialists, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Massimino and Good continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

S125-E-008633 (17 May 2009) --- Astronauts Michael Good (left) and Mike Massimino, both STS-125 mission specialists, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Massimino and Good continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

JSC2008-E-118378 (25 Sept. 2008) --- Astronauts Mike Massimino and Michael Good (partially obscured), both STS-125 mission specialists, are about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Massimino and Good are attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuit. SCUBA-equipped divers (out of frame) are in the water to assist the crewmembers in their rehearsal, intended to help prepare them for work on the Hubble Space Telescope.

S125-E-007511 (15 May 2009) --- Astronaut Mike Massimino works with the Hubble Space Telescope in the cargo bay of the Earth-orbiting Space Shuttle Atlantis. Astronauts Massimino and Michael Good (out of frame) participated in the second session of STS-125 extravehicular activity -- as part of a five-day beehive-like agenda of spacewalking and work on the giant orbital observatory.

S125-E-007534 (15 May 2009) --- Astronaut Mike Massimino works with the Hubble Space Telescope in the cargo bay of the Earth-orbiting Space Shuttle Atlantis. Astronauts Massimino and Michael Good (out of frame) participated in the second session of STS-125 extravehicular activity -- as part of a five-day beehive-like agenda of spacewalking and work on the giant orbital observatory.

S125-E-008779 (17 May 2009) --- Astronauts Michael Good and Mike Massimino (partially obscured), both STS-125 mission specialists, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Massimino and Good continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

JSC2008-E-141532 (6 Nov. 2008) --- Astronauts Mike Massimino and Michael Good (partially obscured), both STS-125 mission specialists, are about to be submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center. Massimino and Good are attired in training versions of their Extravehicular Mobility Unit (EMU) spacesuit. SCUBA-equipped divers are in the water to assist the crewmembers in their rehearsal, intended to help prepare them for work on the Hubble Space Telescope.

S125-E-006449 (12 May 2009) --- Astronaut Mike Massimino, mission specialist, holds a camera on Atlantis? mid deck during the STS-125 flight?s second day in space. The next several days prove to be very busy for the entire crew, as five spacewalks, two of which will have Massimino leaving the shirt sleeved environment of the shuttle to perform work on the Hubble Space Telescope, are in the offing.

S125-E-009640 (18 May 2009) --- Astronaut Gregory C. Johnson, STS-125 pilot, is photographed by astronaut Mike Massimino (mostly out of frame at left), mission specialist, on the flight deck of the Earth-orbiting Space Shuttle Atlantis during flight day eight activities.

JSC2008-E-141520 (6 Nov. 2008) --- Astronaut Mike Massimino, STS-125 mission specialist, gets help in the donning a training version of his Extravehicular Mobility Unit (EMU) spacesuit prior to being submerged in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.

S125-E-007027 (13 May 2009) --- Astronauts Megan McArthur and Mike Massimino, both STS-125 mission specialists, work controls on the aft flight deck of Space Shuttle Atlantis during the flight day three activities.

JSC2008-E-118365 (25 Sept. 2008) --- Attired in a training version of his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Mike Massimino, STS-125 mission specialist, awaits the start of a training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.

S125-E-007903 (16 May 2009) --- Astronaut John Grunsfeld (left) and Mike Massimino, both STS-125 mission specialists, take a moment for a photo on the middeck of Space Shuttle Atlantis, as they prepare for the mission?s third session of extravehicular activity (EVA). Astronaut Andrew Feustel, mission specialist, is at right.

JSC2009-E-072668 (9 April 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, works with extravehicular activity (EVA) hardware during a spacewalk training session in the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.

JSC2009-E-087208 (23 April 2009) --- Astronauts Michael Good (left), Megan McArthur, John Grunsfeld, Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

S125-E-012745 (20 May 2009) --- Astronauts Mike Massimino (left, holding camera), STS-125 mission specialist; and Scott Altman, commander, are pictured on the flight deck of the Earth-orbiting Space Shuttle Atlantis during flight day 10 activities.

S125-E-009915 (18 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, uses a communication system while reading a checklist on the aft flight deck of the Earth-orbiting Space Shuttle Atlantis during flight day eight activities.

S125-E-009639 (18 May 2009) --- Astronaut Scott Altman, STS-125 commander, is photographed by astronaut Mike Massimino (mostly out of frame at left), mission specialist, on the aft flight deck of the Earth-orbiting Space Shuttle Atlantis during flight day eight activities.

JSC2008-E-097093 (1 Aug. 2008) --- Astronauts Mike Massimino (left) and John Grunsfeld, both STS-125 mission specialists, practice repairing Hubble Space Telescope hardware during a training session at NASA's Johnson Space Center.

S125-E-009381 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, wearing the liquid cooling and ventilation garment that complements the Extravehicular Mobility Unit (EMU) spacesuit, is pictured in a hatch on the Earth-orbiting Space Shuttle Atlantis prior to the mission?s fourth session of extravehicular activity (EVA).

S125-E-007280 (13 May 2009) --- Astronauts John Grunsfeld and Mike Massimino (partially out of frame at right), both STS-125 mission specialists, are pictured on the middeck of Space Shuttle Atlantis during flight day three activities.

JSC2009-E-122173 (26 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, addresses a large crowd of well-wishers at the STS-125 crew return ceremony on May 26, 2009 at Ellington Field near NASA?s Johnson Space Center.

JSC2009-E-087220 (23 April 2009) --- Astronaut Mike Massimino (right), STS-125 mission specialist, responds to a question from a reporter during a STS-125 preflight press briefing at NASA's Johnson Space Center. Astronaut John Grunsfeld, mission specialist, is at left.

STS-125 astronaut Mike Massimino, speaks to a reporter on the red carpet prior to the World Premiere of "Hubble 3D", screened at the Smithsonian's Air and Space Museum Tuesday evening, March 9, 2010, in Washington. Photo Credit: (NASA/Paul E. Alers)

S125-E-009916 (18 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, writes notes on a checklist on the aft flight deck of the Earth-orbiting Space Shuttle Atlantis during flight day eight activities.

JSC2008-E-118445 (26 Sept. 2008) --- Astronauts Scott Altman (right), STS-125 commander; Mike Massimino and Megan McArthur, both mission specialists, participate in a training session in the simulation control area in the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility near NASA's Johnson Space Center.

JSC2009-E-087209 (23 April 2009) --- Astronauts Gregory C. Johnson (partially out of frame at left), STS-125 pilot; Michael Good, Megan McArthur, John Grunsfeld and Mike Massimino, all mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

JSC2008-E-096966 (December 2007) --- Astronaut Mike Massimino, STS-125 mission specialist, with home plate from New York City's Shea Stadium during a break from training in the JSC Neutral Buoyancy Lab. The plate will fly with the STS-125 crew aboard the Space Shuttle Atlantis. (Photo Credit: NASA)

JSC2009-E-122209 (26 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, is pictured at the STS-125 crew return ceremony on May 26, 2009 at Ellington Field near NASA?s Johnson Space Center.

S125-E-009398 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Space Shuttle Atlantis? airlock prior to the start of the mission?s fourth session of extravehicular activity (EVA).

JSC2009-E-122159 (26 May 2009) --- Astronauts Megan McArthur, John Grunsfeld (second left), Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured at the STS-125 crew return ceremony on May 26, 2009 at Ellington Field near NASA?s Johnson Space Center.

S125-E-011491 (18 May 2009) --- Astronauts Mike Massimino (left), Michael Good and Megan McArthur (mostly out of frame at right), all STS-125 mission specialists, are pictured in their sleeping bags, which are attached to the lockers on the middeck of the Earth-orbiting Space Shuttle Atlantis at the end of flight day eight.

S125-E-009221 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, is photographed from an aft flight deck window of the Space Shuttle Atlantis during the mission's fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope.

JSC2008-E-097091 (1 Aug. 2008) --- Astronauts Mike Massimino (foreground) and John Grunsfeld, both STS-125 mission specialists, practice repairing Hubble Space Telescope hardware during a training session at NASA's Johnson Space Center.

JSC2009-E-087203 (23 April 2009) --- Astronauts Megan McArthur, John Grunsfeld (second left), Mike Massimino and Andrew Feustel, all STS-125 mission specialists, are pictured during a STS-125 preflight press briefing at NASA's Johnson Space Center.

S125-E-009376 (17 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, peers through an opening of his Extravehicular Mobility Unit (EMU) spacesuit on the Earth-orbiting Space Shuttle Atlantis prior to donning it in preparation for the mission?s fourth session of extravehicular activity.

JSC2008-E-118361 (25 Sept. 2008) --- Attired in a training version of his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Mike Massimino, STS-125 mission specialist, awaits the start of a training session in the waters of the Neutral Buoyancy Laboratory (NBL) near NASA's Johnson Space Center.

CAPE CANAVERAL, Fla. – In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-125 crew members look at cameras they will use on the mission. From left are Mission Specialists Mike Massimino, Andrew Feustel and Mike Good, Pilot Gregory C. Johnson and Commander Scott Altman. The crew is at Kennedy for a crew equipment interface test, which provides hands-on experience with hardware and equipment for the mission. Atlantis is targeted to launch on the STS-125 Hubble Servicing Mission 4 on Oct. 8. Photo credit: NASA/Kim Shiflett

NASA Acting Chief Technologist Douglas Terrier, moderates a panel discussion titled "The Big Picture" with NASA James Webb Space Telescope systems engineer Mike Menzel, SpaceX Director of space operations and former NASA astronaut Garret Reisman, Honeybee Robotics co-founder and chairman Stephen Gorevan, and former NASA astronaut Mike Massimino, Saturday, Aug. 5, 2017 at the Intrepid Sea, Air & Space Museum in New York City. Photo Credit: (NASA/Bill Ingalls)

JSC2008-E-096965 (December 2007) --- Astronauts Mike Massimino (right) and Mike Good, STS-125 mission specialists, with home plate from New York City's Shea Stadium during a break from their training in the JSC Neutral Buoyancy Lab. The plate will fly with the STS-125 crew aboard the Space Shuttle Atlantis. (Photo Credit: NASA)

CAPE CANAVERAL, Fla. – STS-125 Mission Specialist Mike Massimino puts on his launch-and-entry suit before heading for Launch Pad 39A at NASA's Kennedy Space Center in Florida. This launch will be Massimino's second space shuttle flight. Liftoff is scheduled for 2:01 p.m. May 11 EDT. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade NASA's Hubble Space Telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Photo credit: NASA/Kim Shiflett

S125-E-009542 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, positioned on a foot restraint on the end of Space Shuttle Atlantis? remote manipulator system (RMS); and astronaut Mike Massimino (lower right, partially out of frame), mission specialist, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Good and Massimino continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

S125-E-009243 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, positioned on a foot restraint on the end of Atlantis? remote manipulator system (RMS), and astronaut Mike Massimino (bottom), mission specialist, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Good and Massimino continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

CAPE CANAVERAL, Fla. – In the Orbiter Processing Facility at NASA's Kennedy Space Center, a technician (hand raised) discusses details about space shuttle Atlantis with crew members for the STS-125 Hubble Servicing Mission. From left, the crew members are Mission Specialists Megan McArthur, Mike Massimino and Andrew Feustel, Commander Scott Altman, Mission Specialists John Grunsfeld and Mike Good, and Pilot Gregory C. Johnson (foreground). The crew is at Kennedy for a crew equipment interface test, which provides hands-on experience with hardware and equipment for the mission. Atlantis is targeted to launch on the STS-125 Hubble Servicing Mission 4 on Oct. 8. Photo credit: NASA/Kim Shiflett

Audience members, seated under the wing of the space shuttle Enterprise, listen as NASA Acting Chief Technologist Douglas Terrier, moderates a panel discussion titled "The Big Picture" with NASA James Webb Space Telescope systems engineer Mike Menzel, SpaceX Director of space operations and former NASA astronaut Garret Reisman, Honeybee Robotics co-founder and chairman Stephen Gorevan, and former NASA astronaut Mike Massimino, Saturday, Aug. 5, 2017 at the Intrepid Sea, Air & Space Museum in New York City. Photo Credit: (NASA/Bill Ingalls)

S125-E-007563 (15 May 2009) --- Astronaut Michael Good works with the Hubble Space Telescope in the cargo bay of the Earth-orbiting Space Shuttle Atlantis. Astronauts Good and Mike Massimino (working background) participated in the second session of STS-125 extravehicular activity -- as part of a five-day beehive-like agenda of spacewalking and work on the giant orbital observatory.

S125-E-007789 (15 May 2009) --- Astronaut John Grunsfeld signals "thumbs up" to indicate two of his crewmates coming inside from a lengthy space walk are "home." Grunsfeld had just opened the hatch that leads from the mid deck to the airlock. Completing this day's session of extravehicular activity and in the airlock when this photo was made were astronauts Mike Massimino and Michael Good.

S125-E-008608 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, rides Atlantis' remote manipulator system arm to the exact position he needs to be to continue work on the Hubble Space Telescope. Astronaut Mike Massimino, who shared two spacewalks with Good during the last week, is out of frame.

S125-E-012398 (20 May 2009) --- The crewmembers for the STS-125 mission pose for a photo following a news conference on the flight deck of the Earth-orbiting Space Shuttle Atlantis. Pictured on the front row are astronauts Scott Altman (center), commander; Gregory C. Johnson, pilot; and Megan McArthur, mission specialist. Pictured on the back row (left to right) are astronauts Michael Good, Mike Massimino, John Grunsfeld and Andrew Feustel, all mission specialists.

S125-E-008639 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, participates in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Good and astronaut Mike Massimino (out of frame), mission specialist, continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

CAPE CANAVERAL, Fla. – In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-125 Mission Specialists Mike Massimino, Megan McArthur and Andrew Feustel stand underneath space shuttle Atlantis during the crew equipment interface test. The CEIT provides hands-on experience with hardware and equipment for their mission. Atlantis is targeted to launch on the STS-125 Hubble Servicing Mission 4 on Oct. 8. Photo credit: NASA/Kim Shiflett

S125-E-009840 (18 May 2009) --- Astronauts John Grunsfeld (left) and Andrew Feustel, both STS-125 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits; along with astronaut Mike Massimino (center), mission specialist, are pictured in the Earth-orbiting Space Shuttle Atlantis? airlock as they prepare for the mission?s fifth and final session of extravehicular activity (EVA).

S125-E-008663 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, participates in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Good and astronaut Mike Massimino (out of frame), mission specialist, continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

S125-E-007587 (15 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, peers through a window toward Atlantis' crew cabin interior, where his shirt-sleeved support team members busy themselves to aid the flight's second of five sessions of extravehicular activity to perform work on the Hubble Space Telescope. Astronaut Mike Massimino can be seen in the background at work on the port side of the shuttle's cargo bay.

CAPE CANAVERAL, Fla. – In the Orbiter Processing Facility at NASA's Kennedy Space Center, STS-125 Mission Specialist Mike Massimino focuses on the wing of space shuttle Atlantis with a camera to be used on the mission as Mission Specialist John Grunsfeld observes. The crew is at Kennedy for a crew equipment interface test, which provides hands-on experience with hardware and equipment for the mission. Atlantis is targeted to launch on the STS-125 Hubble Servicing Mission 4 on Oct. 8. Photo credit: NASA/Kim Shiflett

S125-E-007564 (15 May 2009) --- Astronaut Michael Good works with the Hubble Space Telescope in the cargo bay of the Earth-orbiting Space Shuttle Atlantis. Astronauts Good and Mike Massimino (out of frame) participated in the second session of STS-125 extravehicular activity -- as part of a five-day beehive-like agenda of spacewalking and work on the giant orbital observatory.

S125-E-009260 (17 May 2009) --- Astronauts Mike Massimino (left) and Michael Good, both STS-125 mission specialists, wearing the liquid cooling and ventilation garments that complement their Extravehicular Mobility Unit (EMU) spacesuits, pose for a photo on the middeck of Space Shuttle Atlantis following the completion of the mission?s fourth session of extravehicular activity (EVA).

S125-E-009226 (17 May 2009) --- Astronaut Megan McArthur, STS-125 mission specialist, poses for a photo with astronaut Mike Massimino, mission specialist, as he looks through an aft flight deck window of the Earth-orbiting Space Shuttle Atlantis during the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope.

S125-E-008744 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, participates in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Good and astronaut Mike Massimino (out of frame), mission specialist, continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.

S125-E-007902 (16 May 2009) --- Astronaut Mike Massimino, STS-125 mission specialist, assists astronaut John Grunsfeld (partially out of frame), mission specialist, in the donning of his Extravehicular Mobility Unit (EMU) spacesuit on the middeck of the Earth-orbiting Space Shuttle Atlantis in preparation for the mission?s third session of extravehicular activity (EVA). Astronaut Andrew Feustel, mission specialist, is at right.

The Orion space capsule along with NASA Astronauts Lee Morin, Alvin Drew, Kjell Lindgren, Serena Aunon, Kate Rubins, and Mike Massimino pass the Presidential viewing stand and President Barack Obama during the inaugural parade honoring Obama, Monday Jan. 21, 2013, in Washington. Obama was sworn-in as the nation's 44th President earlier in the day. Photo Credit: (NASA/Bill Ingalls)