Jump to content

30 Years Ago: The STS-58 Spacelab Life Sciences-2 Mission


Recommended Posts

  • Publishers
Posted

On Oct. 18, 1993, space shuttle Columbia lifted off in support of the STS-58 Spacelab Life Sciences 2 (SLS-2) mission to conduct cutting edge research on physiological adaptation to spaceflight. The seven-member crew of STS-58 consisted of Commander John E. Blaha, Pilot Richard A. Searfoss, Payload Commander Dr. M. Rhea Seddon, Mission Specialists William S. McArthur, Dr. David A. Wolf, and Shannon M. Lucid, and Payload Specialist Dr. Martin J. Fettman, the first veterinarian in space. Dr. Jay C. Buckey  and Laurence R. Young served as alternate payload specialists. During the second dedicated life sciences shuttle mission, they conducted 14 experiments to study the cardiovascular, pulmonary, regulatory, neurovestibular, and musculoskeletal systems to provide a better understanding of physiological responses to spaceflight. The 14-day mission ended on Nov. 1, the longest shuttle flight up to that time.

STS-58 astronauts David A. Wolf, seated left, Shannon M. Lucid, M. Rhea Seddon, and Richard A. Searfoss; John E. Blaha, standing left, William S. McArthur, and Martin J. Fettman The STS-58 crew patch The Spacelab Life Sciences 2 mission patch
Left: STS-58 astronauts David A. Wolf, seated left, Shannon M. Lucid, M. Rhea Seddon, and Richard A. Searfoss; John E. Blaha, standing left, William S. McArthur, and Martin J. Fettman. Middle: The STS-58 crew patch. Right: The Spacelab Life Sciences 2 mission patch.

As its name implies, SLS-2 was the second space shuttle mission dedicated to conducting life sciences research. Because of an oversubscription in the original Spacelab-4 mission, managers decided to split the research flight into two missions to optimize the science return for the principal investigators. The nine-day SLS-1 mission flew in June 1991, its seven-member crew conducting nine life science experiments. Because of her experience as a mission specialist on SLS-1, managers named Seddon as the payload commander for SLS-2. Eight of the 14 experiments used the astronauts as test subjects, and six used 48 laboratory rats housed in 24 cages in the Rodent Animal Holding Facility.

Liftoff of space shuttle Columbia on the STS-58 Spacelab Life Sciences 2 mission View of the Spacelab module in Columbia’s payload bay
Left: Liftoff of space shuttle Columbia on the STS-58 Spacelab Life Sciences 2 mission. Right: View of the Spacelab module in Columbia’s payload bay.

Space shuttle Columbia’s 15th liftoff took place at 10:53 a.m. EST on Oct. 18, 1993, from Launch Pad 39B at NASA’s Kennedy Space Center (KSC) in Florida, carrying the SLS-2 mission into space. Blaha, making his fourth trip into space and second as commander, and Pilot Searfoss on his first launch, monitored Columbia’s systems as they climbed into orbit, assisted by McArthur, also on his first flight, serving as the flight engineer. Seddon, making her third trip into space, accompanied them on the flight deck. Wolf, Lucid, and Fettman experienced launch in the shuttle’s middeck. 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 Spacelab for the first time, activating the module, and getting to work on the experiments, including the first blood draws for the regulatory physiology experiments. The blood samples, stored in the onboard refrigerator for postflight analysis, investigated calcium loss in bone and parameters of fluid and electrolyte regulation.

Dr. David A. Wolf draws a blood sample from Dr. Martin J. Fettman as part of a regulatory physiology experiment Payload Commander Dr. M. Rhea Seddon processes blood samples William S. McArthur uses a metabolic gas analyzer to monitor his pulmonary or lung function
Left: Dr. David A. Wolf draws a blood sample from Dr. Martin J. Fettman as part of a regulatory physiology experiment. Middle: Payload Commander Dr. M. Rhea Seddon processes blood samples.  Right: William S. McArthur uses a metabolic gas analyzer to monitor his pulmonary or lung function.

During the 14-day mission, the seven-member SLS-2 crew served as both experiment subjects and operators. The majority of the science activities took place in the Spacelab module mounted in the shuttle’s payload bay, with SLS-2 marking the ninth flight of the ESA-built pressurized module since its first flight on STS-9 in 1983. The experiments had, of course, begun long before launch with extensive baseline data collection. For Lucid and Fettman, data collection for one of the cardiovascular experiments began four hours before launch and continued through ascent and for the first day or so of the mission. Both volunteered to have catheters threaded through an arm vein and into their hearts to directly measure the effect on central venous pressure from the fluid shift caused by the transition to weightlessness.

Views of the rotating dome experiment Views of the rotating dome experiment
Two views of the rotating dome experiment, used to measure astronauts’ motion perception, with John E. Blaha, left, and Dr. M. Rhea Seddon, as test subjects.

View of the rotating chair View of the rotating chair
Two views of the rotating chair, with Dr. Martin J. Fettman as the subject and Dr. M. Rhea Seddon as the operator, used to test the astronauts’ vestibular systems.

A group of experiments studied the astronauts’ sensory motor adaptation to spaceflight. In one study, the astronauts placed their heads inside a rotating dome with colored dots painted on its inside surface. Using a joystick, the astronauts indicated in which direction they perceived the rotation of the dots. A rotating chair measured how reflexive eye movements change in weightlessness. Using a bungee harness to simulate falling, astronauts reported on their sensation of and their reflexes to “falling” in microgravity.

Earth observation photographs taken by the STS-58 crew. Memphis, Tennessee Earth observation photographs taken by the STS-58 crew. The Richat Structure in Mauritania Earth observation photographs taken by the STS-58 crew. Cyprus, Türkiye, and the eastern Mediterranean Sea. Earth observation photographs taken by the STS-58 crew. Tokyo Bay
A selection of the Earth observation photographs taken by the STS-58 crew. Left: The Memphis, Tennessee, area. Middle left: The Richat Structure in Mauritania. Middle right: Cyprus, Türkiye, and the eastern Mediterranean Sea. Right: Tokyo Bay.

In addition to the complex set of SLS-2 experiments, the STS-58 astronauts’ activities also included other science and operational items. They conducted several experiments as part of the Extended Duration Orbiter Medical Program, including the use of lower body negative pressure as a potential countermeasure to cardiovascular changes, in particular orthostatic intolerance, as shuttle missions flew ever longer missions. The astronauts talked to ordinary people on the ground using the Shuttle Amateur Radio Experiment, or ham radio. As on all missions, they enjoyed looking at the Earth. When not participating as a test subject for the various experiments or needing to monitor Columbia’s systems, Searfoss in particular took advantage of their unique vantage point, taking more than 4,000 photographs of the Earth below. Blaha and Searfoss tested the Portable In-flight Landing Operations Trainer (PILOT), a laptop computer to help them maintain proficiency in landing the shuttle.

STS-58 astronauts William A. McArthur, top, Martin J. Fettman, David A. Wolf, Richard A. Searfoss, John E. Blaha, M. Rhea Seddon, and Shannon M. Lucid inside the Spacelab module McArthur operates the Shuttle Amateur Radio Experiment, or ham radio Pilot Searfoss uses the Portable In-flight Landing Operations Simulator, a laptop computer to practice landing the space shuttle
Left: STS-58 astronauts William A. McArthur, top, Martin J. Fettman, David A. Wolf, Richard A. Searfoss, John E. Blaha, M. Rhea Seddon, and Shannon M. Lucid inside the Spacelab module. Middle: McArthur operates the Shuttle Amateur Radio Experiment, or ham radio. Right: Pilot Searfoss uses the Portable In-flight Landing Operations Simulator, a laptop computer to practice landing the space shuttle.

On their last day in space, the astronauts finished the experiments, Wolf deactivated the Spacelab module, and they strapped themselves into their seats to prepare for the return to Earth. They fired the shuttle’s Orbital Maneuvering System engines to begin the descent from orbit. Blaha piloted Columbia to a smooth landing on Runway 22 at Edwards Air Force Base in California’s Mojave Desert on Nov. 1, after completing 225 orbits around the Earth in 14 days and 12 minutes. The astronauts exited Columbia about one hour after landing and transferred to the Crew Transport Vehicle, a converted people-mover NASA purchased from Dulles International Airport near Washington, D.C. This allowed them to remain in a supine position to minimize the effects of gravity on the early postflight measurements. While Blaha, Searfoss, and McArthur returned to Houston a few hours after landing, Seddon, Wolf, Lucid, and Fettman continued extensive data collection at the Dryden, now Armstrong, Fight Research Center at Edwards for several days before returning to Houston. Ground crews towed Columbia from the runway to the Mate-Demate Facility to begin preparing it for its ferry flight back to KSC atop the Shuttle Carrier Aircraft and its next mission, STS-62, the United States Microgravity Payload-2 mission.

Space Shuttle Columbia lands at NASA’s Kennedy Space Center in Florida to end the 14-day STS-58 Spacelab Life Sciences 2 (SLS-2) mission The seven STS-58 SLS-2 crew members have exited Columbia and transferred to the Crew Transport Vehicle to begin postflight data collection
Left: Space Shuttle Columbia lands at NASA’s Kennedy Space Center in Florida to end the 14-day STS-58 Spacelab Life Sciences 2 (SLS-2) mission. Right: The seven STS-58 SLS-2 crew members have exited Columbia and transferred to the Crew Transport Vehicle to begin postflight data collection.

Summarizing the scientific return from the flight, Mission Scientist Howard J. Schneider said, “All of our accomplishments exceeded our expectations.” Program Scientist Frank M. Sulzman added, “This has been the best shuttle mission for life sciences to date.” Principal investigators published the results of the experiments from SLS-1 and SLS-2 in a special edition of the Journal of Applied Physiology in July 1996. Enjoy the crew-narrated video about the STS-58 SLS-2 mission.

View the full article

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By NASA
      An interesting fact about Johnson Space Center’s Anika Isaac, MS, LPC, LMFT, LCDC, CEAP, NCC, is that there are more letters following her name than there are in it.

      A licensed professional counselor, marriage and family therapist, and chemical dependency counselor with several other certifications, Isaac has been a fixture of Johnson’s Employee Assistance Program for the last 13 years. She provides confidential counseling and assessment, crisis response, referrals to community providers, and debriefing and support to Johnson’s workforce. Additionally, Isaac leads assertiveness skills training for employees, provides management consults, and presents on various mental health topics by request. She also coordinates the center’s Autism Support Group, which convenes monthly to offer networking, resource sharing, and support for caregivers of those with autism.

      Official portrait of Anika Isaac.NASA Isaac’s invaluable counsel earned her a Silver Snoopy Award in 2022. Presented by Johnson Director Vanessa Wyche and NASA astronaut Jessica Meir, the award recognized Isaac’s exceptional efforts to support NASA’s ability to execute the tasks necessary for safe human spaceflight. “I taught, modeled, and empowered thousands to address critical issues and topics in the workplace, directly impacting mission success and safety,” she said.

      Anika Isaac (center) receives a Silver Snoopy Award from Johnson Space Center Director Vanessa Wyche (left) and NASA astronaut Jessica Meir. NASA Isaac has also proudly participated in transparent, authentic conversations about personal and socially significant questions raised by the Johnson community, by leading panel discussions during center events and more. “Having those brave and bold conversations are necessary to foster a compassionate workplace culture that we emphasize through the Johnson Expected Behaviors,” she said.

      Isaac said her work experiences prior to joining NASA not only affected her personally but also shaped her professionally. “The most troublesome challenges have been dealing with colleagues whom I saw be divisive in their comments and manipulative in their actions,” she said. “I overcame those challenges with faith, time, and talking to mentors and my trusted support system for perspective and guidance.”

      Isaac’s career has also taught her to trust herself and give herself some grace. “In each moment I have everything I need to be successful and keep learning when I fall short of my expectations,” she said. She has come to appreciate the value of her unique experience and skillset, as well. “In an agency with so many experts in so many disciplines, in my respective discipline my expertise is as necessary and essential to the success of NASA’s mission,” she said. “I have also learned to stay persistent with my goals, since there are enough people to help me achieve them along the way.”

      Johnson’s Employee Assistance Program (EAP) received a Group Achievement Award for the team’s support of the Johnson community following Hurricane Harvey in 2017 and the Santa Fe High School shooting in 2018. From left: Vanessa Wyche, Anika Isaac, EAP Executive Director Jackie Reese, EAP Counselor Daisy Wei, and Mark Geyer, who was Johnson’s director at the time.NASA Isaac looks forward to a future of space exploration that combines the best of the commercial sector, international partnerships, and NASA’s strengths with incredible advances in artificial intelligence and other technologies to ensure crew safety while propelling humanity further into the cosmos. She also celebrates the different backgrounds and cultures of today’s astronaut corps. “We are seeing a level of diversity in the faces of space explorers that has never existed before in the history of the space program,” she said.

      Isaac encourages the Artemis Generation to learn and incorporate key aspects of NASA and space exploration history into their work while building their own culture and valuing their unique perspectives. “Trust yourself! Have you not usually recovered from setbacks? Those that came before you made similar mistakes,” she said. “Pay attention and learn from them. And build those crucial, reciprocal mentor and social relationships to enhance your ongoing personal and work journey.”

      View the full article
    • By NASA
      The first shuttle mission of 1995, STS-63 included several historic firsts. As part of Phase 1 of the International Space Station program, space shuttle Discovery’s 20th flight conducted the first shuttle rendezvous with the Mir space station, in preparation for future dockings. The six-person crew included Commander James Wetherbee, Pilot Eileen Collins – the first woman to pilot a space shuttle mission – Payload Commander Bernard Harris, and Mission Specialists Michael Foale, Janice Voss, and Vladimir Titov. The spacewalk conducted during the mission included the first African American and the first British born astronauts to walk in space. The crew conducted 20 science and technology experiments aboard the third flight of the Spacehab module. The astronauts deployed and retrieved the SPARTAN-204 satellite that during its two-day free flight carried out observations of galactic objects using an ultraviolet instrument. 

      The STS-63 crew patch. The STS-63 crew of Janice Voss, front row left, Eileen Collins, James Wetherbee, and Vladimir Titov; Bernard Harris, back row left, and Michael Foale. The Shuttle-Mir program patch. NASA announced the six-person STS-63 crew in September 1993 for a mission then expected to fly in May 1994. Wetherbee, selected by NASA in 1984, had already flown twice in space, as pilot on STS-32 and commander of STS-52. For Collins, selected in the class of 1990 as the first woman shuttle pilot, STS-63 marked her first spaceflight. Also selected in 1990, Harris had flown previously on STS-55 and Voss on STS-57. Foale, selected as an astronaut in 1987, had flown previously on STS-45 and STS-56. Titov, selected as a cosmonaut in 1976, had flown two previous spaceflights – a two-day aborted docking mission to Salyut-7 and the first year-long mission to Mir – and survived a launch pad abort. He served as backup to Sergei Krikalev on STS-60, who now served as Titov’s backup. 

      Space shuttle Discovery rolls out to Launch Pad 39B. The STS-63 crew during the Terminal Countdown Demonstration Test in the White Room of Launch Pad 39B. The STS-63 astronauts walk out of crew quarters for the van ride out to the launch pad. Space shuttle Discovery arrived back at NASA’s Kennedy Space Center in Florida on Sept. 27, 1994, after a ferry flight from California following its previous mission, STS-64. Workers towed it to the Orbiter Processing Facility the next day. Following installation of the Spacehab, SPARTAN, and other payloads, on Jan. 5, 1995, workers rolled Discovery from the processing facility to the Vehicle Assembly Building for mating with an external tank and twin solid rocket boosters. Rollout to Launch Pad 39B took place on Jan. 10. On Jan. 17-18, teams conducted the Terminal Countdown Demonstration Test, a dress rehearsal for the countdown to launch planned for Feb. 2, with the astronaut crew participating in the final few hours as they would on launch day. They returned to Kennedy on Jan. 29 for final pre-launch preparations. On Feb. 2, launch teams called a 24-hour scrub to allow time to replace a failed inertial measurement unit aboard Discovery. 

      Launch of space shuttle Discovery on mission STS-63. STS-63 Commander James Wetherbee on Discovery’s flight deck. STS-63 Pilot Eileen Collins on Discovery’s flight deck. On Feb. 3, Discovery and its six-person crew lifted off from Launch Pad 39B at 12:22 a.m. EST, the time dictated by orbital mechanics – Discovery had to launch into the plane of Mir’s orbit. Within 8.5 minutes, Discovery had reached orbit, for the first time in shuttle history at an inclination of 51.6 degrees, again to match Mir’s trajectory. Early in the mission, one of Discovery’s 44 attitude control thrusters failed and two others developed minor but persistent leaks, threatening the Mir rendezvous.  

      View of the Spacehab module in Discovery’s payload bay. The SPARTAN-204 satellite attached to the remote manipulator system or robotic arm during the flight day two operations. On the mission’s first day in space, Harris and Titov activated the Spacehab module and several of its experiments. Wetherbee and Collins performed the first of five maneuvers to bring Discovery within 46 miles of Mir for the final rendezvous on flight day four. Teams on the ground worked with the astronauts to resolve the troublesome thruster problems to ensure a safe approach to the planned 33 feet. On flight day 2, as those activities continued, Titov grappled the SPARTAN satellite with the shuttle’s robotic arm and lifted it out of the payload bay. Scientists used the ultraviolet instrument aboard SPARTAN to investigate the ultraviolet glow around the orbiter and the aftereffects of thruster firings. The tests complete, Titov placed SPARTAN back in the payload bay.

      The Mir space station as seen from Discovery during the rendezvous. Space shuttle Discovery as seen from Mir during the rendezvous. Mir during Discovery’s flyaround. On flight day three, the astronauts continued working on science experiments while Wetherbee and Collins completed several more burns for the rendezvous on flight day four, the thruster issues resolved to allow the close approach to 33 feet. Flying Discovery manually from the aft flight deck, and assisted by his crew mates, Wetherbee slowly brought the shuttle to within 33 feet of the Kristall module of the space station. The STS-63 crew communicated with the Mir-17 crew of Aleksandr Viktorenko, Elena Kondakova, and Valeri Polyakov via VHF radio, and the crews could see each other through their respective spacecraft windows. After station-keeping for about 10 minutes, Wetherbee slowly backed Discovery away from Mir to a distance of 450 feet. He flew a complete circle around Mir before conducting a final separation maneuver. 

      The SPARTAN-204 satellite as it begins its free flight on flight day five. STS-63 crew member Vladimir Titov works on an experiment in the Spacehab module. On the mission’s fifth day, Titov once again grappled SPARTAN with the robotic arm, but this time after raising it above the payload bay, he released the satellite to begin its two-day free flight. Wetherbee steered Discovery away from the departing satellite. During its free flight, the far ultraviolet imaging spectrograph aboard SPARTAN recorded about 40 hours of observations of galactic dust clouds. During this time, the astronauts aboard the shuttle continued work on the 20 experiments in Spacehab and prepared for the upcoming spacewalk. 

      STS-63 crew member Janice Voss operates the remote manipulator system during the retrieval of the SPARTAN-204 satellite. STS-63 astronauts Bernard Harris, left, and Michael Foale at the start of their spacewalk. Wetherbee and the crew flew the second rendezvous of the mission on flight day seven to retrieve SPARTAN. Voss operated the robotic arm to capture and stow the satellite in the payload bay following its 43-hour free flight. Meanwhile, Foale and Harris suited up in the shuttle’s airlock and spent four hours breathing pure oxygen to rid their bodies of nitrogen to prevent decompression sickness, also known as the bends, when they reduced their spacesuit pressures for the spacewalk. 

      Astronauts Bernard Harris, left, and Michael Foale during the spacesuit thermal testing part of their spacewalk. Foale, left, and Harris during the mass handling part of their spacewalk. Foale and Harris exited the airlock minutes after Voss safely stowed SPARTAN. With Titov operating the robotic arm, Harris and Foale climbed aboard its foot restraint to begin the first phase of the spacewalk, testing modifications to the spacesuits for their thermal characteristics. Titov lifted them well above the payload bay and the two spacewalkers stopped moving for about 15 minutes, until their hands and feet got cold. The spacewalk then continued into its second portion, the mass handling activity. Titov steered Foale above the SPARTAN where he lifted the satellite up and handed it off to Harris anchored in the payload bay. Harris then moved it around in different directions to characterize handling of the 2,600-pound satellite. Foale and Harris returned to the airlock after a spacewalk lasting 4 hours 39 minutes. 

      The STS-63 astronauts pose for their inflight crew photo. Discovery makes a successful landing at NASA’s Kennedy Space Center in Florida. The day following the spacewalk, the STS-63 crew finished the science experiments, closed down the Spacehab module, and held a news conference with reporters on the ground. Wetherbee and Collins tested Discovery’s thrusters and aerodynamic surfaces in preparation for the following day’s reentry and landing. The next day, on Feb. 11, they closed Discovery’s payload bay doors and put on their launch and entry suits. Wetherbee guided Discovery to a smooth landing on Kennedy’s Shuttle Landing Facility, ending the historic mission after eight days, six hours, and 28 minutes. They orbited the Earth 129 times. The mission paved the way for nine shuttle dockings with Mir beginning with STS-71, and 37 with the International Space Station. Workers at Kennedy towed Discovery to the processing facility to prepare it for its next mission, STS-70 in July 1995. 
      Over the next three years, Wetherbee, Collins, Foale, and Titov all returned to Mir during visiting shuttle flights, with Foale staying aboard as the NASA-5 long-duration crew member. Between 2001 and 2005, Wetherbee, Collins, and Foale also visited the International Space Station. Wetherbee commanded two assembly flights, Collins commanded the return to flight mission after the Columbia accident, and Foale commanded Expedition 8. 
      Enjoy the crew narrate a video about their STS-63 mission. 

      Explore More
      9 min read 30 Years Ago: STS-60, the First Shuttle-Mir Mission
      Article 1 year ago 7 min read Space Station 20th: STS-71, First Shuttle-Mir Docking
      Article 5 years ago 11 min read Space Station 20th: Launch of Mir 18 Crew
      Article 5 years ago View the full article
    • By NASA
      NASA Science Live: Asteroid Bennu Originated from World with Ingredients and Conditions for Life
    • By NASA
      In this video frame, Jason Dworkin holds up a vial that contains part of the sample from asteroid Bennu delivered to Earth by NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security – Regolith Explorer) mission in 2023. Dworkin is the mission’s project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.Credit: NASA/James Tralie Studies of rock and dust from asteroid Bennu delivered to Earth by NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification and Security–Regolith Explorer) spacecraft have revealed molecules that, on our planet, are key to life, as well as a history of saltwater that could have served as the “broth” for these compounds to interact and combine.
      The findings do not show evidence for life itself, but they do suggest the conditions necessary for the emergence of life were widespread across the early solar system, increasing the odds life could have formed on other planets and moons.
      “NASA’s OSIRIS-REx mission already is rewriting the textbook on what we understand about the beginnings of our solar system,” said Nicky Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “Asteroids provide a time capsule into our home planet’s history, and Bennu’s samples are pivotal in our understanding of what ingredients in our solar system existed before life started on Earth.”
      In research papers published Wednesday in the journals Nature and Nature Astronomy, scientists from NASA and other institutions shared results of the first in-depth analyses of the minerals and molecules in the Bennu samples, which OSIRIS-REx delivered to Earth in 2023.
      Detailed in the Nature Astronomy paper, among the most compelling detections were amino acids – 14 of the 20 that life on Earth uses to make proteins – and all five nucleobases that life on Earth uses to store and transmit genetic instructions in more complex terrestrial biomolecules, such as DNA and RNA, including how to arrange amino acids into proteins.
      Scientists also described exceptionally high abundances of ammonia in the Bennu samples. Ammonia is important to biology because it can react with formaldehyde, which also was detected in the samples, to form complex molecules, such as amino acids – given the right conditions. When amino acids link up into long chains, they make proteins, which go on to power nearly every biological function.
      These building blocks for life detected in the Bennu samples have been found before in extraterrestrial rocks. However, identifying them in a pristine sample collected in space supports the idea that objects that formed far from the Sun could have been an important source of the raw precursor ingredients for life throughout the solar system.
      “The clues we’re looking for are so minuscule and so easily destroyed or altered from exposure to Earth’s environment,” said Danny Glavin, a senior sample scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and co-lead author of the Nature Astronomy paper. “That’s why some of these new discoveries would not be possible without a sample-return mission, meticulous contamination-control measures, and careful curation and storage of this precious material from Bennu.”
      While Glavin’s team analyzed the Bennu samples for hints of life-related compounds, their colleagues, led by Tim McCoy, curator of meteorites at the Smithsonian’s National Museum of Natural History in Washington, and Sara Russell, cosmic mineralogist at the Natural History Museum in London, looked for clues to the environment these molecules would have formed. Reporting in the journal Nature, scientists further describe evidence of an ancient environment well-suited to kickstart the chemistry of life.
      Ranging from calcite to halite and sylvite, scientists identified traces of 11 minerals in the Bennu sample that form as water containing dissolved salts evaporates over long periods of time, leaving behind the salts as solid crystals.
      Similar brines have been detected or suggested across the solar system, including at the dwarf planet Ceres and Saturn’s moon Enceladus.
      Although scientists have previously detected several evaporites in meteorites that fall to Earth’s surface, they have never seen a complete set that preserves an evaporation process that could have lasted thousands of years or more. Some minerals found in Bennu, such as trona, were discovered for the first time in extraterrestrial samples.
      “These papers really go hand in hand in trying to explain how life’s ingredients actually came together to make what we see on this aqueously altered asteroid,” said McCoy.
      For all the answers the Bennu sample has provided, several questions remain. Many amino acids can be created in two mirror-image versions, like a pair of left and right hands. Life on Earth almost exclusively produces the left-handed variety, but the Bennu samples contain an equal mixture of both. This means that on early Earth, amino acids may have started out in an equal mixture, as well. The reason life “turned left” instead of right remains a mystery.
      “OSIRIS-REx has been a highly successful mission,” said Jason Dworkin, OSIRIS-REx project scientist at NASA Goddard and co-lead author on the Nature Astronomy paper. “Data from OSIRIS-REx adds major brushstrokes to a picture of a solar system teeming with the potential for life. Why we, so far, only see life on Earth and not elsewhere, that’s the truly tantalizing question.”
      NASA Goddard provided overall mission management, systems engineering, and the safety and mission assurance for OSIRIS-REx. Dante Lauretta of the University of Arizona, Tucson, is the principal investigator. The university leads the science team and the mission’s science observation planning and data processing. Lockheed Martin Space in Littleton, Colorado, built the spacecraft and provided flight operations. NASA Goddard and KinetX Aerospace were responsible for navigating the OSIRIS-REx spacecraft. Curation for OSIRIS-REx takes place at NASA’s Johnson Space Center in Houston. International partnerships on this mission include the OSIRIS-REx Laser Altimeter instrument from CSA (Canadian Space Agency) and asteroid sample science collaboration with JAXA’s (Japan Aerospace Exploration Agency) Hayabusa2 mission. OSIRIS-REx is the third mission in NASA’s New Frontiers Program, managed by the agency’s Marshall Space Flight Center in Huntsville, Alabama, for the agency’s Science Mission Directorate in Washington.
      For more information on the OSIRIS-REx mission, visit:
      https://www.nasa.gov/osiris-rex
      Karen Fox / Molly Wasser
      Headquarters, Washington
      202-358-1600
      karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov
      Rani Gran
      Goddard Space Flight Center, Greenbelt, Maryland
      301-286-2483
      rani.c.gran@nasa.gov
      Share
      Details
      Last Updated Jan 29, 2025 EditorJessica TaveauLocationNASA Headquarters Related Terms
      OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer) Asteroids Bennu Goddard Space Flight Center Science Mission Directorate

      View the full article
    • By Space Force
      Secretary Pete Hegseth was sworn in as the 29th Secretary of Defense.

      View the full article
  • Check out these Videos

×
×
  • Create New...