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25 Years Ago: STS-95, John Glenn Returns to Space


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On Oct. 29, 1998, NASA astronaut John H. Glenn made history again when he returned to space aboard space shuttle Discovery’s STS-95 mission, nearly 37 years after becoming the first American in orbit during his February 1962 Friendship 7 mission. The seven-member STS-95 crew consisted of Commander Curtis L. Brown, Pilot Steven W. Lindsey, Mission Specialists Stephen K. Robinson, Dr. Scott E. Parazynski, and Pedro F. Duque of the European Space Agency, and Payload Specialists Dr. Chiaki Mukai of the National Space Development Agency of Japan, now the Japan Aerospace Exploration Agency, and Glenn, who at age 77 became the oldest person to orbit the Earth, a record that stands to this day. During the nine-day mission, they conducted more than 80 experiments, many of them to study how exposure to weightlessness might relate to the aging process.

The STS-95 crew during their introductory press conference President William J. “Bill” Clinton introduces the STS-95 crew
Left: The STS-95 crew during their introductory press conference. Right: President William J. “Bill” Clinton introduces the STS-95 crew, including Senator John H. Glenn, during a ceremony at NASA’s Johnson Space Center in Houston.

Glenn, whom NASA essentially grounded after his historic 1962 mission for fear of losing a national hero in a spaceflight accident, had always dreamed of returning to space. Upon learning about the physiological changes that occur during spaceflight, and how they somewhat resemble those brought about by aging, now Senator Glenn began lobbying NASA Administrator Daniel S. Goldin for an opportunity to put that theory to the test, by volunteering himself as a subject. Goldin agreed in principle, providing Glenn passed the same physicals as all the other astronauts and that the flight included valuable peer-reviewed research. Glenn did, and teams at NASA working with the National Institutes of Health’s National Institute on Aging to put together a research program of experiments to study bone and muscle loss, balance disorders, sleep disturbances, and changes in the immune system. In addition, the mission conducted other experiments in fields such as materials processing, protein crystal growth, cell biology, and plant growth. Also part of the mission, the SPARTAN 201-5 free-flyer pallet carried instruments to study the Sun’s corona and the solar wind. On Jan. 16, 1998, NASA announced that Glenn would fly as a payload specialist on STS-95. On Feb. 13, the agency announced the rest of the STS-95 crew, who held a press conference at NASA’s Johnson Space Center (JSC) on Feb. 20, coincidentally the 36th anniversary of Glenn’s Friendship 7 flight. During a visit to JSC on April 14, President William J. “Bill” Clinton introduced the STS-95 astronauts.

STS-95 astronauts Steven W. Lindsey, seated left, and Curtis L. Brown; Scott E. Parazynski, standing left, Stephen K. Robinson, Chiaki Mukai of the National Space Development Agency of Japan, now the Japan Aerospace Exploration Agency, Pedro F. Duque of the European Space Agency, and John H. Glenn The STS-95 crew patch Liftoff of space shuttle Discovery on the STS-95 mission, returning Glenn to orbit
Left: STS-95 astronauts Steven W. Lindsey, seated left, and Curtis L. Brown; Scott E. Parazynski, standing left, Stephen K. Robinson, Chiaki Mukai of the National Space Development Agency of Japan, now the Japan Aerospace Exploration Agency, Pedro F. Duque of the European Space Agency, and John H. Glenn. Middle: The STS-95 crew patch. Right: Liftoff of space shuttle Discovery on the STS-95 mission, returning Glenn to orbit.

Space shuttle Discovery’s 25th liftoff took place at 2:19 p.m. EDT on Oct. 29, 1998, from Launch Pad 39B at NASA’s Kennedy Space Center (KSC) in Florida, carrying a double Spacehab module filled with scientific equipment. Brown, making his fifth trip into space and second as commander, and Pilot Lindsey on his second launch, monitored Discovery’s systems as they climbed into orbit, assisted by Mission Specialist Parazynski, a physician making his third trip into space, serving as the flight engineer. Mission Specialist Duque accompanied them on the flight deck. Mission Specialist Robinson, on his second mission, and Payload Specialists Mukai, also a physician and on her second trip to space, and Glenn experienced launch in the shuttle’s middeck.

View of the Spacehab module and the Canadian robotic arm in Discovery’s payload bay The crew’s first view of the interior of the Spacehab module Chiaki Mukai, left, and Stephen K. Robinson begin activating the Spacehab
Left: View of the Spacehab module and the Canadian robotic arm in Discovery’s payload bay. Middle: The crew’s first view of the interior of the Spacehab module. Right: Chiaki Mukai, left, and Stephen K. Robinson begin activating the Spacehab.

Upon reaching orbit, the crew opened the payload bay doors, thus deploying the shuttle’s radiators. Shortly after, the crew opened the hatch from the shuttle’s middeck, translated down the transfer tunnel, and entered Spacehab for the first time, activating the module and turning on the first experiments. These included the life sciences experiments that Glenn conducted to compare the effects of weightlessness and aging.

Physician astronaut Dr. Scott E. Parazynski, left, prepares to draw a blood sample from John H. Glenn Glenn, left, and Parazynski prepare to centrifuge the collected blood sample Glenn, instrumented for a sleep study, prepares to begin his sleep period
Left: Physician astronaut Dr. Scott E. Parazynski, left, prepares to draw a blood sample from John H. Glenn. Middle: Glenn, left, and Parazynski prepare to centrifuge the collected blood sample. Right: Glenn, instrumented for a sleep study, prepares to begin his sleep period.

The STS-95 astronauts use the Canadian-built Remote Manipulator system, or robotic arm, to release the SPARATAN 201-5 free flyer Stephen K. Robinson operates the RMS to retrieve the SPARTAN after its four-day autonomous flight Robinson places the SPARTAN back in the shuttle’s payload bay
Left: The STS-95 astronauts use the Canadian-built Remote Manipulator system, or robotic arm, to release the SPARATAN 201-5 free flyer. Middle: Stephen K. Robinson operates the RMS to retrieve the SPARTAN after its four-day autonomous flight. Right: Robinson places the SPARTAN back in the shuttle’s payload bay.

On the mission’s second day, the crew deployed the PANSAT, a small experimental communications satellite built by the Naval Postgraduate School in Monterey, California. Later in the day, Robinson used the Canadian-built Remote Manipulator System (RMS) or robotic arm to grapple the SPARTAN free flyer. He removed it from its cradle in the payload bay and deployed it for its four-day independent mission. It successfully completed its autonomous flight, traveling up to 30 miles from the shuttle. On flight day 6, Robinson used the RMS to capture SPARTAN and placed it back in its cradle in the payload bay.

Stephen K. Robinson processes a sample in the Advanced Gradient Heating Facility (AGHF) John H. Glenn operates the Osteoporosis Experiment in Orbit (OSTEO) payload investigating the behavior of bone cells in microgravity
Left: Stephen K. Robinson processes a sample in the Advanced Gradient Heating Facility (AGHF). Right: John H. Glenn operates the Osteoporosis Experiment in Orbit (OSTEO) payload investigating the behavior of bone cells in microgravity.

Scott E. Parazynski prepares an experiment in the Microgravity Science Glovebox Chiaki Mukai examines plants grown in the Biological Research in Canisters (BRIC) experiment
Left: Scott E. Parazynski prepares an experiment in the Microgravity Science Glovebox. Right: Chiaki Mukai examines plants grown in the Biological Research in Canisters (BRIC) experiment.

For the remainder of the mission, the seven-member crew busied itself with conducting the 80 experiments in the shuttle’s middeck, the Spacehab, and in the payload bay.

Chiaki Mukai operates the Vestibular Function Experiment Unit (VFEU) investigation the vestibular systems of toadfish John H. Glenn removes cartridges from the Advanced Separation (ADSEP) experiment Steven Lindsey operates the BIOBOX used to store biological samples
Left: Chiaki Mukai operates the Vestibular Function Experiment Unit (VFEU) investigation the vestibular systems of toadfish. Middle: John H. Glenn removes cartridges from the Advanced Separation (ADSEP) experiment. Right: Steven Lindsey operates the BIOBOX used to store biological samples.

Pedro F. Duque operates the Microencapsulation Electrostatic Processing System (MEPS) experiment Chiaki Mukai operates the high-definition camcorder provided by the Japanese company NHK John H. Glenn takes one of the 2,500 Earth observation images obtained during the STS-95 mission
Left: Pedro F. Duque operates the Microencapsulation Electrostatic Processing System (MEPS) experiment. Middle: Chiaki Mukai operates the high-definition camcorder provided by the Japanese company NHK. Right: John H. Glenn takes one of the 2,500 Earth observation images obtained during the STS-95 mission.

Photograph of the Hawaiian Islands  taken by the STS-95 crew Photograph of Houston taken by the STS-95 crew Photograph of Florida taken by the STS-95 crew Photograph of Yemen and the Horn of Africa taken by the STS-95 crew
A selection of the Earth observation photographs taken by the STS-95 crew. Left: The Hawaiian Islands. Middle left: Houston. Middle right: Florida. Right: Yemen and the Horn of Africa.

STS-95 astronauts, clockwise from lower left, Pedro F. Duque, Chiaki Mukai, Scott E. Parazynski, John H. Glenn, Curtis L. Brown, Steven W. Lindsey, and Stephen K. Robinson Brown, left, and Lindsey review entry checklists before donning their launch and entry suits in preparation for returning to Earth Mukai, left, and Duque help Glenn, center, put on his launch and entry suit for reentry
Left: STS-95 astronauts, clockwise from lower left, Pedro F. Duque, Chiaki Mukai, Scott E. Parazynski, John H. Glenn, Curtis L. Brown, Steven W. Lindsey, and Stephen K. Robinson. Middle: Brown, left, and Lindsey review entry checklists before donning their launch and entry suits in preparation for returning to Earth. Right: Mukai, left, and Duque help Glenn, center, put on his launch and entry suit for reentry.

On their last day in space, the crew finished the experiments, closed up the Spacehab module, donned their launch and entry suits, and strapped themselves into their seats to prepare for their return to Earth. They fired the shuttle’s Orbital Maneuvering System engines to begin the descent from orbit. Brown piloted Discovery to a smooth landing at KSC’s Shuttle Landing Facility on Nov. 7, after completing 134 orbits around the Earth in 8 days, 21 hours, and 44 minutes. The astronauts exited Discovery about one hour after landing and immediately began their postflight data collection to measure their immediate physiological responses after returning to a 1 g environment. Ground crews towed Discovery to the Orbiter Processing Facility to begin preparing it for its next mission, STS-96, the first shuttle docking to the International Space Station. The astronauts returned to Houston’s Ellington Field, where a large crowd of well-wishers, including government officials and the media, welcomed them home.

Space Shuttle Discovery lands at NASA’s Kennedy Space Center (KSC) in Florida to end the nine-day STS-95 mission sts-95 postlanding Dignitaries including Isao Uchida, president of Japan’s National Space
Left: Space Shuttle Discovery lands at NASA’s Kennedy Space Center (KSC) in Florida to end the nine-day STS-95 mission. Middle: Dignitaries including Isao Uchida, president of Japan’s National Space Development Agency, KSC Director Roy D. Bridges, and NASA Administrator Daniel S. Goldin greet the returning STS-95 crew after their landing. Right: Dignitaries including Houston Mayor Lee P. Brown, left, U.S. Representative Sheila Jackson Lee, U.S. Senator Kay Bailey Hutchison, Administrator Goldin, and Johnson Space Center Director George W.S. Abbey greet the STS-95 crew at Ellington Field in Houston.

U.S. Senator Kay Bailey Hutchison addresses the crowd at Ellington Field gathered to welcome the STS-95 crew back to Houston NASA Administrator Daniel S. Goldin addresses the crowd at Ellington as the STS-95 astronauts listen
Left: U.S. Senator Kay Bailey Hutchison addresses the crowd at Ellington Field gathered to welcome the STS-95 crew back to Houston. Right: NASA Administrator Daniel S. Goldin addresses the crowd at Ellington as the STS-95 astronauts listen.

Enjoy the crew-narrated video about the STS-95 mission.

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      During the second spacewalk, astronauts C. Michael Foale, left, and Claude Nicollier during the changeout of the fine guidance sensor. Foale at the end of the Remote Manipulator System services the Hubble Space Telescope. The next day, Nicollier and Foale conducted the mission’s second spacewalk. The main task for this excursion involved installing a new computer aboard Hubble, replacing the original 1970s vintage unit. The new radiation-hardened system ran 20 times faster and carried six times more memory while using one-third the electrical power. They also installed a fine guidance sensor before concluding the eight-hour 10-minute spacewalk.
      Astronauts Steven L. Smith, left, and John M. Grunsfeld begin their servicing activities during the third spacewalk. At the end of the third and final spacewalk, Grunsfeld, left, and Smith provide closing comments about the work the mission accomplished to service the Hubble Space Telescope. Smith and Grunsfeld ventured outside for a second time to complete the flight’s third and final spacewalk on Dec. 24, the first spacewalk conducted on Christmas Eve day. First, they replaced an old reel-to-reel tape recorder with a solid state unit providing a 10-fold increase in recording capability and replaced a failed data transmitter. They installed seven new covers on Hubble’s electronics bay doors for added protection of the telescope’s insulation. This third spacewalk lasted eight hours eight minutes.
      The first space shuttle crew to celebrate Christmas in space, the STS-103 astronauts pose wearing Santa hats. The Hubble Space Telescope shortly after the STS-103 crew released it. The next day, the STS-103 astronauts earned the distinction as the first space shuttle crew to spend Christmas Day in space. Clervoy grappled Hubble, lifted it out of the payload bay and released it to continue its mission. Hubble Space Telescope Program Manager John H. Campbell said after the release, “The spacecraft is being guided by its new gyros under the control of its brand new computer. [It] is now orbiting freely and is in fantastic shape.” After deploying Hubble, the astronauts enjoyed a well-deserved Christmas dinner, with Clervoy providing French delicacies. The crew spent Dec. 26 readying Discovery for its return to Earth, including testing its reaction control system thrusters and aerodynamic surfaces and stowing unneeded gear.
      Astronauts Steven L. Smith, left, Claude Nicollier, and John M. Grunsfeld complete their fluid loading protocol and put on their launch and entry suits prior to reentry. Space shuttle Discovery makes a perfect night landing at NASA’s Kennedy Space Center in Florida. The crew welcome home ceremony at Ellington Field in Houston. On Dec. 27, the astronauts donned their launch and entry suits and prepared for the return to Earth. They closed the payload bay doors and fired Discovery’s engines to bring them out of orbit. Just before landing, Kelly lowered the craft’s landing gear and Brown guided Discovery to a smooth night landing at KSC, concluding a flight of seven days, 23 hours, 11 minutes. They circled the Earth 119 times. The flight marked Discovery’s last solo flight as all its subsequent missions docked with the International Space Station. Workers at KSC began readying it for its next mission, STS-92 in October 2000.

      The Hubble Space Telescope continues to operate today, far exceeding the five-year life extension expected from the last of the servicing missions in 2009. Joined in space by the James Webb Space Telescope in 2021, the two instruments together continue to image the skies across a broad range of the electromagnetic spectrum to provide scientists with the tools to gain unprecedented insights into the universe and its formation.

      Watch the STS-103 crew narrate a video of their Hubble servicing mission.
      View the full article
    • By European Space Agency
      Video: 00:10:27 In 1975, 10 European countries came together with a vision to collaborate on key space activities: science and astronomy, launch capabilities and space applications: the European Space Agency, ESA, was born.
      In 2025, we mark half a century of joint European achievement – filled with firsts and breakthroughs in science, exploration and technology, and the space infrastructure and economy that power Europe today.
       
      During the past five decades ESA has grown, developing ever bolder and bigger projects and adding more Member States, with Slovenia joining as the latest full Member State in January.
       
      We’ll also celebrate the 50th anniversary of ESA’s Estrack network, 30 years of satellite navigation in Europe and 20 years since ESA launched the first demonstration satellite Giove-A which laid the foundation for the EU’s own satnav constellation Galileo. Other notable celebrations are the 20th anniversary of ESA’s Business Incubation Centres, or BICs, and the 30th year in space for SOHO, the joint ESA and NASA Solar and Heliospheric Observatory.
       
      Sadly though, 2025 will mean end of science operations for Integral and Gaia. Integral, ESA's gamma-ray observatory has exotic objects in space since 2002 and Gaia concludes a decade of mapping the stars. But as some space telescopes retire, another one provides its first full data release. Launched in 2023, we expect Euclid’s data release early in the new year.
       
      Launch-wise, we’re looking forward to Copernicus Sentinel-4 and -5 (Sentinel-4 will fly on an MTG-sounder satellite and Sentinel-5 on the MetOp-SG-A1 satellite), Copernicus Sentinel-1D, Sentinel-6B and Biomass. We’ll also launch the SMILE mission, or Solar wind Magnetosphere Ionosphere Link Explorer, a joint mission with the Chinese academy of science.
       
      The most powerful version of Europe’s new heavy-lift rocket, Ariane 6, is set to fly operationally for the first time in 2025. With several European commercial launcher companies planning to conduct their first orbital launches in 2025 too, ESA is kicking off the European Launcher Challenge to support the further development of European space transportation industry.
       
      In human spaceflight, Polish ESA project astronaut Sławosz Uznański will fly to the ISS on the commercial Axiom-4 mission. Artemis II will be launched with the second European Service Module, on the first crewed mission around the Moon since 1972.
      The year that ESA looks back on a half century of European achievement will also be one of key decisions on our future. At the Ministerial Council towards the end of 2025, our Member States will convene to ensure that Europe's crucial needs, ambitions and the dreams that unite us in space become reality.
      So, in 2025, we’ll celebrate the legacy of those who came before but also help establish a foundation for the next 50 years. Join us as we look forward to a year that honours ESA’s legacy and promises new milestones in space.
      View the full article
    • By NASA
      1 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      Christopher PestakCredit: NASA  Christopher Pestak, program manager of the Glenn Engineering and Research Support (GEARS) contract at NASA’s Glenn Research Center in Cleveland, has received the 2025 Sustained Service Award from the American Institute of Aeronautics and Astronautics (AIAA). This award recognizes AIAA members who have given their time, dedication, and efforts in service to AIAA, the aerospace community, and the engineering profession.  
      Pestak oversees and coordinates the efforts of 350 contractor employees performing a wide range of scientific, engineering, and technical support work for NASA Glenn on the GEARS contract. He joined NASA in 1983 as an engineering contractor supporting the Atlas/Centaur and Shuttle/Centaur projects.  
      A Fellow of AIAA, Pestak serves as the deputy director for Educational Programs in AIAA Region III, which encompasses Ohio, Indiana, Michigan, Wisconsin, Kentucky, and Illinois. He will be recognized for his service during an AIAA awards ceremony in January.  
      Return to Newsletter Explore More
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