First Look: Spaceplane Stacked and Shaken at NASA Test Facility
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First Look: Spaceplane Stacked and Shaken at NASA Test Facility
Nose-up and bathed in soft blue lights, Sierra Space’s Dream Chaser spaceplane and its Shooting Star cargo module cast dramatic shadows onto the walls of NASA’s Neil Armstrong Test Facility in Sandusky, Ohio, as members of the media got their first glimpse of the towering 55-foot-tall stack on Feb. 1.
The spaceplane and its cargo module are undergoing testing at the facility to prepare for the extreme environment of space.
Luke Staab, senior project manager at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio, shares more about recent testing of Sierra Space’s Dream Chaser spaceplane.
Credit: NASA/Steven Logan
“The Armstrong Test Facility is one of NASA Glenn Research Center’s most critical assets,” said Dr. Jimmy Kenyon, center director of NASA Glenn in Cleveland, during a media event where Tom Vice, chief executive officer of Sierra Space; Phil Dempsey, transportation integration manager for the International Space Station Program; and Dr. Tom Marshburn, former NASA astronaut and chief medical officer for Sierra Space, were also on hand for interviews.
“Here, we have some of the world’s largest and most capable simulation and test facilities to test the harsh conditions that spacecraft will experience during launch and in flight.»
Dr. Jimmy Kenyon
Center Director of NASA’s Glenn Research Center in Cleveland
“Here, we have some of the world’s largest and most capable simulation and test facilities to test the harsh conditions that spacecraft will experience during launch and in flight,” Kenyon said.
Using the world’s most powerful spacecraft shaker system, NASA exposed Dream Chaser and Shooting Star to vibrations like those it will experience during launch and re-entry into the atmosphere.
Next up, Dream Chaser will move to a huge, in-ground vacuum chamber that will continue to simulate the space environment Dream Chaser will encounter on its mission. The spaceplane will be put through its paces, experiencing low ambient pressures, low-background temperatures, and dynamic solar heating.
This testing marks progress toward Dream Chaser’s first uncrewed demonstration flight to the International Space Station later this year as part of NASA’s Commercial Resupply Program. On its first flight, Dream Chaser is scheduled to deliver over 7,800 pounds of cargo. NASA’s work with commercial industry is leading to more people, science, and commercial opportunities in space for the benefit of humanity.
Sierra Space’s Dream Chaser spaceplane and its Shooting Star Cargo module seen inside the Mechanical Vibration Facility at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio, on Feb. 1.
Credit: NASA/Jef Janis
Phil Dempsey, transportation integration manager for the International Space Station Program, speaks to members of the media during an event at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio, on Feb. 1.
Credit: NASA/Jef Janis
Sierra Space’s Dream Chaser spaceplane and its Shooting Star Cargo module stacked inside the Mechanical Vibration Facility at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio. Members of the media got their first glimpse of Dream Chaser during an event on Feb. 1.
Credit: NASA/Jef Janis
From left: Dr. Tom Marshburn, former NASA astronaut and chief medical officer for Sierra Space; Dr. Jimmy Kenyon, center director of NASA’s Glenn Research Center in Cleveland; Tom Vice, chief executive officer of Sierra Space; and Phil Dempsey, transportation integration manager for the International Space Station Program, speak to members of the media during an event at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio, on Feb. 1.
Credit: NASA/Jef Janis
Tom Vice, chief executive officer of Sierra Space, offers remarks about the company’s Dream Chaser spaceplane during a media event at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio, on Feb. 1.
Credit: NASA/Jef Janis
“We collectively, NASA and Sierra Space, go to space to benefit life on Earth.»
Tom vice
Chief Executive Officer of Sierra Space
“We collectively, NASA and Sierra Space, go to space to benefit life on Earth,” Vice said. “The most significant industrial revolution in history is underway in space. You have to kind of step back and inhale everything you’re witnessing, the magnitude of what you’re witnessing; the signs are all around us that we are now living in the orbital age.”
NASA Selects Agencywide Acquisition Support Services Contractor
NASA has selected 8(a) vendor Seventh Sense Consulting LLC of Woodbridge, Virginia, to provide acquisition support services for non-inherently governmental functions across the agency.
The contractor will provide services agencywide, including document development support, procurement administrative services, acquisition policy support, procurement operations support, procurement source selection support, cost/pricing support, and contract closeout support. The latter will be performed at all NASA centers, and the acquisition support may be performed at any NASA center, either on-site, off-site, or hybrid.
This award will result in a single-award blanket purchase agreement to an 8(a) small business. The maximum contract value is about $77.5 million. A one-year base period begins on Friday, March 1. The contract includes up to four one-year options with the potential to extend services through Aug. 31, 2029.
For information about NASA and agency programs, visit:
NASA Administrator Announces New Marshall Space Flight Center Director
NASA Administrator Bill Nelson on Feb. 5 named Joseph Pelfrey director of the agency’s Marshall Space Flight Center, effective immediately. Pelfrey has served as acting center director since July 2023.
“Joseph is a respected leader who shares the passion for innovation and exploration at NASA Marshall. As center director, he will lead the entire Marshall workforce, which includes a world-renowned team of scientists, engineers, and technologists who have a hand in nearly every NASA mission,” said Nelson. “I am confident that under Joseph’s leadership, Marshall will continue to make critical advancements supporting Artemis and Moon to Mars that will benefit all humanity.”
Marshall Space Flight Center Director Joseph Pelfrey.
NASA
NASA Marshall is one of the agency’s largest field centers, and manages NASA’s Michoud Assembly Facility, where some of the largest elements of the SLS (Space Launch System) rocket and Orion spacecraft for the Artemis campaign are manufactured. The center also is responsible for the oversight and execution of an approximately $5 billion portfolio comprised of human spaceflight, science, and technology development efforts. Its workforce consists of nearly 7,000 employees, both civil servants and contractors.
“Marshall is renowned for its expertise in exploration and scientific discovery, and I am honored and humbled to be chosen to lead the center into the future,” said Pelfrey. “We will continue to shape the future of human space exploration by leading SLS and human landing system development for Artemis and leveraging our capabilities to make critical advancements in human landing and cargo systems, habitation and transportation systems, advanced manufacturing, mission operations, and cutting-edge science and technology missions.”
Pelfrey talks during a 2023 all-hands meeting at Marshall.
NASA/Charles Beason
Prior to joining NASA, Pelfrey worked in industry, supporting development of space station payload hardware. He began his NASA career as an aerospace engineer in the Science and Mission Systems Office, going on to serve in various leadership roles within the International Space Station Program, the Marshall Engineering Directorate and the SLS Spacecraft/Payload Integration and Evolution Office. He also served as manager for the Commercial Orbital Transportation Services Project at Marshall and the Exploration and Space Transportation Development Office in the Flight Programs and Partnerships Office.
Appointed to the Senior Executive Service in 2016, Pelfrey served as the associate director for operations in Engineering, later becoming deputy manager and subsequently manager for Marshall’s Human Exploration Development and Operations Office. He was appointed as Marshall’s deputy center director in April 2022.
Pelfrey received a bachelor’s degree in Aerospace Engineering from Auburn University in 2000.
NASA to Demonstrate Autonomous Navigation System on Moon
By Rick Smith
When the second CLPS (Commercial Lunar Payload Services) delivery is launched to the Moon in mid-February, its NASA payloads will include an experiment that could change how human explorers, rovers, and spacecraft independently track their precise location on the Moon and in cis-lunar space.
Demonstrating autonomous navigation, the Lunar Node-1 experiment, or LN-1, is a radio beacon designed to support precise geolocation and navigation observations for landers, surface infrastructure, and astronauts, digitally confirming their positions on the Moon relative to other craft, ground stations, or rovers on the move. These radio beacons also can be used in space to help with orbital maneuvers and with guiding landers to a successful touchdown on the lunar surface.
Lunar Node-1, or LN-1, an autonomous navigation payload that will change how human explorers safely traverse the Moon’s surface and live and work in lunar orbit, awaits liftoff as part of Intuitive Machines’ IM-1 mission, its first under NASA’s Commercial Lunar Payload Services initiative. LN-1 was developed, built, and tested at NASA’s Marshall Space Flight Center.
NASA/Intuitive Machines
“Imagine getting verification from a lighthouse on the shore you’re approaching, rather than waiting on word from the home port you left days earlier,” said Evan Anzalone, principal investigator of LN-1 and a navigation systems engineer at NASA’s Marshall Space Flight Center. “What we seek to deliver is a lunar network of lighthouses, offering sustainable, localized navigation assets that enable lunar craft and ground crews to quickly and accurately confirm their position instead of relying on Earth.”
The system is designed to operate as part of a broader navigation infrastructure, anchored by a series of satellites in lunar orbit as being procured under NASA’s Lunar Communications Relay and Navigation Systems project. Together, future versions of LN-1 would utilize LunaNet-defined standards to provide interoperable navigation reference signals from surface beacons as well as orbital assets.
Currently, navigation beyond Earth is heavily reliant on point-to-point services provided by NASA’s Deep Space Network, an international array of giant radio antennas which transmit positioning data to interplanetary spacecraft to keep them on course. These measurements typically are relayed back to Earth and processed on the ground to deliver information back to the traveling vehicle.
But when seconds count during orbital maneuvers, or among explorers traversing uncharted areas of the lunar surface, LN-1 offers a timely improvement, Anzalone said.
IM-1, the first NASA Commercial Launch Program Services launch for Intuitive Machines’ Nova-C lunar lander, will carry multiple payloads to the Moon, including Lunar Node-1, demonstrating autonomous navigation via radio beacon to support precise geolocation and navigation among lunar orbiters, landers, and surface personnel. NASA’s CLPS initiative oversees industry development of small robotic landers and rovers to support NASA’s Artemis campaign.
NASA/Intuitive Machines
The CubeSat-sized experiment is one of six payloads included in the NASA delivery manifest for Intuitive Machines of Houston, which will be launched via a SpaceX Falcon 9 from Cape Canaveral, Florida. Designated IM-1, the launch is the company’s first for NASA’s CLPS initiative, which oversees industry development, testing, and launch of small robotic landers and rovers supporting NASA’s Artemis campaign.
The Nova-C lander is scheduled to touch down near Malapert A, a lunar impact crater in the Moon’s South Pole region.
LN-1 relies on networked computer navigation software known as MAPS (Multi-spacecraft Autonomous Positioning System). Developed by Anzalone and researchers at Marshall, MAPS was successfully tested on the International Space Station in 2018 using NASA’s Space Communications and Navigation testbed.
Engineers at Marshall conducted all structural design, thermal and electronic systems development, and integration and environmental testing of LN-1 as part of the NASA-Provided Lunar Payloads project funded by the agency’s Science Mission Directorate. Anzalone and his team delivered the payload in 2021, having performed the payload build during the COVID pandemic. Since then, they refined the operating procedures, conducted thorough testing of the integrated flight system, and in October 2023, oversaw installation of LN-1 on Intuitive Machines’ lander.
Demonstrating autonomous navigation, the Lunar Node-1 experiment, or LN-1, is a radio beacon designed to support precise geolocation and navigation observations to orbiters, landers, and surface personnel, digitally confirming their positions on the Moon relative to other craft, ground stations, or rovers on the move. The system is designed to operate as part of a broader navigation infrastructure, anchored by a series of satellites in lunar orbit as being procured under NASA’s Lunar Communications Relay and Navigation Systems project. (NASA)
The payload will transmit information briefly each day during the journey to the Moon. Upon lunar touchdown, the LN-1 team will conduct a full systems checkout and begin continuous operations within 24 hours of landing. NASA’s Deep Space Network will receive its transmissions, capturing telemetry, Doppler tracking, and other data and relaying it back to Earth. Researchers at NASA’s Jet Propulsion Laboratory and at Morehead State University in Kentucky also will monitor LN-1’s transmissions throughout the mission, which is scheduled to last approximately 10 days.
Eventually, as the technology is proven and its infrastructure expanded, Anzalone expects LN-1 to evolve from a single lighthouse on the lunar shore into a key piece of a much broader infrastructure, helping NASA evolve its navigation system into something more akin to a bustling metropolitan subway network, wherein every train is tracked in real time as it travels its complex route.
“Spacecraft, surface vehicles, base camps and exploratory digs, even individual astronauts on the lunar surface,” Anzalone said. “LN-1 could connect them all and help them navigate more accurately, creating a reliable, more autonomous lunar network.”
Marshall’s LN-1 team is already discussing future Moon to Mars applications for LN-1 with NASA’s SCaN (Space Communications and Navigation) program – which oversees more than 100 NASA and partner missions. They’re also consulting with the European Space Agency and Japan Aerospace Exploration Agency, aiding the push to unite spacefaring nations via an interconnected, interoperable global architecture.
“Eventually, these same technologies and applications we’re proving at the Moon will be vital on Mars, making those next generations of human explorers safer and more self-sufficient as they lead us out into the solar system,” Anzalone said.
NASA’s CLPS initiative enables NASA to buy a complete commercial robotic lunar delivery service from leading aerospace contractors. The provider is responsible for launch services, owns its lander design, and leads landing operations. Learn more here.
Smith, an Aeyon/MTS employee, supports the Marshall Office of Communications.
Marshall Wraps Up Mentoring Month with Mega Meal, Mentoring Panel
By Jessica Barnett
There was no shortage of opportunities in January to learn about the benefits of mentoring from those who have experienced them firsthand. In fact, there was so much to share, team members at NASA’s Marshall Space Flight Center kept the celebration going through the first week of February.
“It was so great to see so many from our workforce out and excited about mentorship,” said Selina Salgado, who serves as the Mentoring Program coordinator at Marshall. “At every event throughout the month and when reading through the highlights, I was encouraged by the engagement and commitment that the Marshall team showed for development.”
Marshall Space Flight Center Chief Financial Officer Rhega Gordon, center, who participates in the center’s Mentorship Program, discusses the benefits of mentoring and her advice for getting the most out of a mentoring relationship during a panel event held Feb. 6 in Activities Building 4316 as part of Marshall’s celebration of National Mentoring Month. Joining her on stage are two of her mentees, program specialist Kim Henry and Marshall Sustainability Coordinator Malene McElroy.
NASA/Danielle Burleson
This year’s events included Meals with Mentors, in which team members could have lunch and chat with mentors from a variety of backgrounds and departments, and an in-person mentoring panel Feb. 6 featuring Marshall Chief Financial Officer Rhega Gordon and two of her mentees, Marshall Sustainability Coordinator Malene McElroy and program specialist Kim Henry.
Marshall also participated in the launch for AMPED (Agencywide Mentoring Pilot for Engagement & Development), which pairs mentors and mentees together using the MentorcliQ platform. Civil servants can sign up for AMPED now through Feb. 19.
Marshall team members can also participate in MERGE, a NASA-built mentoring application that allows users to create and view profiles to identify potential mentors or mentees. MERGE is recommended for casual, informal, or short-term mentoring relationships, as well as shadowing opportunities. Civil servants and contractors can sign up at any time.
Marshall Associate Center Director, Technical, Larry Leopard engages with center team members during a Meals with Mentors event Feb. 6 in Activities Building 4316. Team members were encouraged to chat with center leaders and potential mentors at the event as part of Marshall’s celebration of National Mentoring Month.
NASA/Danielle Burleson
In addition to in-person events and showcasing new options for finding a mentor or mentee, there were weekly tips to help team members get the most out of their mentorship journey and interviews with mentors and mentees, who shared their experiences, advice, and more.
“Our hope was that employees would reengage with mentorship, find value in their current relationships, or provide resources and guidance to help those who were new to the world of mentoring,” Salgado said.
Marshall team members can start or continue their mentorship journey by visiting the Marshall Mentorship Program page on Inside Marshall.
Barnett, a Media Fusion employee, supports the Marshall Office of Communications.
Mission Success is in Our Hands is a safety initiative collaboration between NASA’s Marshall Space Flight Center and Jacobs. As part of the initiative, eight Marshall team members are featured in new testimonial banners placed around the center. This is the fourth in a Marshall Star series profiling team members featured in the testimonial banners. The next Mission Success is in Our Hands Shared Experience Forum will be Feb. 22 and will feature Robert Conway, deputy director of NASA’s Safety Center. The 11:30 a.m. event will be in Activities Building 4316 for Marshall team members.
Ashley Marlar is the Jacobs Space Exploration Group team lead of Operations Engineering Support at Marshall, responsible for managing a team of four Jacobs Transportation engineers supporting the center’s Transportation and Logistics Engineering Office. Marlar and her team develop and execute detailed plans, procedures, and engineered lift analyses to transport NASA’s SLS (Space Launch System) flight hardware and test articles, as well as hardware for various other programs and projects at Marshall.
Ashley Marlar is the Jacobs Space Exploration Group Team Lead of Operations Engineering Support at NASA’s Marshall Space Flight Center, supporting the Transportation and Logistics Engineering Office.
NASA/Charles Beason
She has worked at Marshall for eight years, including six years with Jacobs, starting her career as a transportation and logistics engineer. A native of Hazel Green, Alabama, Marlar is a graduate of the University of Alabama in Huntsville where she earned a bachelor’s degree in aerospace engineering.
Question: How does your work support the safety and success of NASA and Marshall missions?
Marlar: The thorough coordination and detailed planning of each hardware movement is absolutely critical to the safety of the hardware and the personnel handling it, and the success of the mission. We must anticipate risks and consider contingency plans. Whether it’s offloading a welded component from the delivery truck, installing a test article into a structural test stand, or shipping the SLS core stage on the barge Pegasus from NASA’s Michoud Assembly Facility to the agency’s Kennedy Space Center, we meticulously plan every step of the operation to ensure the hardware is delivered without mishaps or delays.
Question: What does the Mission Success is in Our Hands initiative mean to you?
Marlar: To me it means every individual plays a vital role in making our missions safe and successful. We all contribute to NASA’s success by bringing our unique skills and perspectives to the table. And we are all responsible for the safety of ourselves and each other by having the courage to speak up and ask questions.
Question: Do you have a story or personal experience you can share that might help others understand the significance of mission assurance or flight safety?
Marlar: One of the things we do to help ensure mission safety is perform dry runs, like dress rehearsals, for many of our major moves. For example, we utilized the core stage Pathfinder vehicle to practice our transportation methods and iron out all the little details of our procedures without risking the actual core stage flight unit. We repeatedly practiced installing the Pathfinder onto ground support equipment, lifting and rotating it from horizontal to vertical orientation, and installing it into the B2 test stand at Stennis Space Center. Then we did everything in reverse. We did this multiple times to identify any challenges, safety issues, or workflow inefficiencies we might face when it came time to perform these tasks with the real thing, and then made many procedural changes and some hardware changes to mitigate those risks and resolve numerous issues. All of this paid off in a big way when we transported, lifted, and tested the flight core stage flawlessly.
Question: How can we work together better to achieve mission success?
Marlar: Mission success is a team effort and a shared responsibility. I think it’s vital to encourage and empower everyone to speak up and share their ideas and concerns as well as hold each other accountable. We should continue to reinforce the importance of communication and engagement, particularly as we emerge from a pandemic.
Question: Do you have anything else you’d like to share?
Marlar: My primary goal is to make sure my team gets home safe and sound at the end of the day. As important and grand as our mission is, our biggest asset is our people. We are a collective of many pieces in a large puzzle, but every piece is equally important to the whole.
Smith, a Media Fusion employee and the Marshall Star editor, supports the Marshall Office of Communications.
NASA Taps Alabama A&M University to Host Break the Ice Lunar Challenge
By Savannah Bullard
NASA has selected Alabama A&M University’s Agribition Center in Huntsville to host the final level of the agency’s Break the Ice Lunar Challenge, using indoor and outdoor space to ground test the finalists’ solutions.
The challenge opened in 2020 to find novel solutions for excavating icy lunar regolith and delivering acquired resources in extreme environmental conditions. In alignment with NASA’s Moon to Mars objectives, the challenge aims to develop technologies that could support a sustained human presence on the Moon.
Alabama A&M University’s Agribition Center will host the final Break the Ice Lunar Challenge featuring a large dirt-based indoor arena on 40 acres of land, offering plenty of green space to build Break the Ice’s complex testing infrastructure.
Photo Courtesy: Alabama A&M University Extension
Throughout the challenge, competitors have designed, built, and independently tested robots that could theoretically withstand the harsh environments inside permanently shadowed regions of the lunar South Pole. The six finalists who succeeded in Phase 2: Level 2 of the challenge were announced in December 2023.
“We were looking for a unique set of criteria to house the Break the Ice Lunar competition, so we partnered with Jacobs Space Exploration Group in finding a facility,” said Denise Morris, NASA Centennial Challenges program manager at NASA’s Marshall Space Flight Center. “Alabama A&M is a good fit for this challenge because of the on-site capabilities they have and being close to NASA facilities makes logistics much easier.”
Located a few miles east of the Alabama A&M University campus, the Agribition (agriculture + exhibition) Center is managed by the Alabama Cooperative Extension System with support from the university and its College of Agricultural, Life, and Natural Sciences. Its indoor arena features a large dirt space, typically equipped to support rodeos and other agricultural expos. Outside, the center sits on roughly 40 acres of land, offering plenty of green space to build the competition’s complex infrastructure.
The final Phase 2: Level 3 testing will occur June 10-12, 2024. There are two components that each team will focus on mastering: excavation and transportation.
Six identically sized concrete slabs will be set up inside the arena for the finalists’ robots to dig. The slabs, measuring 300 cubic feet, will have qualities similar to a permanently shadowed crater located at the Moon’s South Pole. A gravity-offloading crane and pulley system will lift the excavators while working, simulating the one-sixth gravity experienced on the Moon.
Each team will have one hour to dig as much material as possible or until they reach the payload capacity of their excavation robot. Up to three top-performing teams will earn an opportunity to test their solution inside one of the thermal vacuum chambers located at Marshall, which can simulate the temperature and vacuum conditions at the lunar South Pole.
Outside the Agribition Center, challenge teams will take turns on a custom-built track outfitted with slopes, boulders, pebbles, rocks, and gravel to simulate the lunar surface. This volatile surface will stretch approximately 300 meters and include several twists and turns for more intermediate handling.
Each team will get one hour on the track to deliver a payload and return to the starting point. Times, distances, and pitfalls will be recorded independently.
“These two testing methods address the excavation and transportation of large quantities of icy regolith, which are some of NASA’s current top technology gaps,” said Naveen Vetcha, NASA challenge manager at Jacobs Space Exploration Group. “This competition has enabled teams to develop lightweight, energy efficient, reliable and durable hardware, all while performing well in Moon-like conditions like reduced gravity and complex terrain.”
The total prize purse is $1.5 million, with the first-place winner taking home $1 million and the second-place winner receiving $500,000.
The Break the Ice Lunar Challenge is a NASA Centennial Challenge led by Marshall, with support from NASA’s Kennedy Space Center. Centennial Challenges are part of the Prizes, Challenges, and Crowdsourcing program under NASA’s Space Technology Mission Directorate. Ensemble Consultancy supports challenge competitors.
Bullard, a Manufacturing Technical Solutions Inc. employee, supports the Marshall Office of Communications.
Mars, Venus Appear Very Close to Each Other this Month
By Lauren Perkins
February is a great month for the early rising skygazers. Venus has been bright in the morning sky all year, rising just before the Moon.
This graphic shows Venus, Earth and its Moon, and Mars.
NASA/JPL-Caltech/ESA
In the minutes before dawn this week, Venus will rise to the upper left of the waning crescent Moon and will be joined by Mars. Over the coming weeks, Venus will shift towards Mars until they appear to merge into one another, just a half a degree apart, on Feb. 22.
To view this planetary illusion, you’ll need to find a place with a clear view of the western horizon – few to no tall trees or buildings.
For more skygazing opportunities, including observing spiral galaxy M81, check out the video from Jet Propulsion Laboratory’s monthly “What’s Up” video series.
Perkins, a Media Fusion employee, supports the Marshall Office of Communications.
Astronaut Bruce McCandless Performs the First Untethered Spacewalk
NASA
Astronaut Bruce McCandless II approaches his maximum distance from the Earth-orbiting Space Shuttle Challenger in this 70mm photo from Feb. 7, 1984. While testing out the nitrogen-propelled, hand-controlled back-pack device called the manned maneuvering unit (MMU) for the first time, McCandless’s fellow crewmembers aboard the reusable vehicle photographed him. The MMU allowed crews to move outside of the cargo bay and perform activities away from the safety of the spacecraft. “It may have been one small step for Neil,” he proclaimed, “but it’s a heck of a big leap for me.”
50 Years Ago: Skylab 4 Astronauts Return From Record-Breaking Spaceflight
The longest spaceflight up to that time ended on Feb. 8, 1974, when Skylab 4 astronauts Gerald P. Carr, Edward G. Gibson, and William R. Pogue splashed down in the Pacific Ocean after their 84-day mission aboard Skylab, America’s first space station. During their stay, they carried out a challenging research program, including biomedical investigations on the effects of long-duration space flight on the human body, Earth observations using the Earth Resources Experiment Package, and solar observations with instruments mounted in the Apollo Telescope Mount (ATM). To study newly discovered Comet Kohoutek, scientists added cometary observations to the crew’s already busy schedule, including adding a far ultraviolet camera to Skylab’s instrument suite. The astronauts conducted four spacewalks, a then-record for a single Earth orbital mission.
Left: View from the Skylab 4 Command and Service Module (CSM) shortly after undocking from Skylab. Middle: Skylab during the final fly around, with the CSM’s shadow visible on the solar array. Right: Distant view of Skylab as the crew departed.
Carr, Gibson, and Pogue spent the first week of February 1974 finishing up their experiments, preparing the station for uncrewed operations, and packing their Command Module (CM) with science samples and other items for return to Earth. On Feb. 8, they closed all the hatches to Skylab and undocked their CM. Carr flew a complete loop around Skylab, the crew inspecting the station, noting the discoloration caused by solar irradiation. The sunshade installed by the Skylab 3 crew appeared to be in good condition. Finally, Carr fired the spacecraft’s thrusters to separate from the station. Three and a half hours after undocking, they received the go for the deorbit burn and fired the Service Module’s (SM) main engine. After 84 days in weightlessness, the burn felt like “a kick in the pants” to the astronauts. They separated the CM from the SM, but when Carr tried to reorient it with its heat shield forward for reentry, nothing happened! Carr switched to a backup system and corrected the problem, caused by an inadvertent flipping of the wrong circuit breakers. Reentry took place without incident, the two drogue parachutes opened at 24,000 feet to slow and stabilize the spacecraft, followed by the three main parachutes at 10,000 feet to slow the descent until splashdown.
Left: Splashdown of Skylab 4, ending the longest crewed mission to that time. Right: The Skylab 4 Command Module in the apex down or Stable II position.
Splashdown of Skylab 4 took place 176 miles from San Diego and three miles from the prime recovery ship the helicopter carrier U.S.S. New Orleans (LPH-11). The mission of 84 days 1 hour 16 minutes set a human spaceflight duration record for that time. Carr, Gibson, and Pogue had orbited the Earth 1,214 times and traveled 70.5 million miles. The CM first assumed a Stable II or apex down orientation in the water. Balloons at the top of the spacecraft inflated within minutes to right it to the Stable I or apex up position. In Mission Control at NASA’s Johnson Space Center (JSC) in Houston, flight controllers met the splashdown with mixed feelings – elation at the conclusion of the longest and highly successful mission and sadness at the end of the Skylab program with an upcoming prolonged hiatus in human spaceflights until the Apollo-Soyuz Test Project in July 1975. The three major television networks chose not to carry the splashdown live, the first American splashdown not covered live since the capability began with the Gemini VI mission in 1965. The networks deemed the event not newsworthy.
Mission Control at the NASA Johnson Space Center in Houston shortly after the Skylab 4 splashdown.
Left: Recovery helicopter from the U.S.S. New Orleans about to drop swimmers into the water. Middle: Swimmers attach an inflatable collar around the Skylab 4 Command Module (CM). Right: Sailors lift the CM onto an elevator deck on the New Orleans.
Within 40 minutes of splashdown, recovery teams had placed an inflatable collar around the spacecraft and lifted it aboard the New Orleans. Seven minutes later, they had the hatch open and flight surgeons quickly examined the three astronauts, declaring them to be healthy.
Left: Aboard the U.S.S. New Orleans, Edward G. Gibson emerges first from the Skylab 4 Command Module (CM). Middle: William R. Pogue stands after emerging from the CM. Right: Skylab 4 crew members Gibson, left, Pogue, and Gerald P. Carr seated on a forklift platform after emerging from the CM and on their way to the medical facility.
Gibson, riding in the spacecraft’s center seat, emerged first, followed by Pogue. Carr exited last, befitting his role as commander. They walked the few steps to a platform where they could sit and wave to the cheering sailors. A forklift picked up the entire platform with the astronauts, and transported them to the Skylab mobile medical facilities aboard the carrier. Extensive medical examinations of the astronauts continued throughout landing day while the carrier sailed toward San Diego.
Left: Skylab 4 Commander Gerald P. Carr enjoys a cup of coffee during medical testing aboard the U.S.S. New Orleans. Right: During a break from medial testing, the Skylab 4 astronauts mingle with some of the crew aboard the New Orleans.
Medical exams revealed Carr, Gibson, and Pogue to have withstood the rigors of weightlessness better than the previous two Skylab crews despite having spent more time in space. They attributed this to their increased exercise regimen, including the use of the Thornton treadmill, and better nutrition, an assertion backed up by flight surgeons and scientists. While on board ship, they had limited contact with the staff, all of whom wore protective masks when in close proximity to the crew to maintain the strict postflight medical quarantine.
Left: From aboard the U.S.S. New Orleans, Skylab 4 astronauts Gerald P. Carr, left, Edward G. Gibson, and William R. Pogue wave to the crowd assembled dockside at North Island Naval Air Station (NAS) in San Diego. Middle: Carr, top, Gibson, and Pogue board a U.S. Air Force transport jet at North Island NAS that flew them to Houston. Right: Carr, Gibson, and Pogue aboard the transport jet on their way to Houston.
Carr, Gibson, and Pogue remained aboard the New Orleans until completion of the landing plus 2-day medical exams. The ship had arrived at North Island Naval Air Station in San Diego the morning of Feb. 9, and the astronauts participated in a dockside welcoming ceremony while remaining on the carrier. The next day, the trio left the carrier and boarded a U.S. Air Force transport jet that flew them to Ellington Air Force Base in Houston.
Left: At Ellington Air Force Base in Houston, Skylab 4 astronauts Gerald P. Carr, bottom, Edward G. Gibson, and William R. Pogue descend the steps from the U.S. Air Force jet that had flown them from San Diego. Middle: Pogue, left, Gibson, and Carr hug their wives for the first time in more than three months. Right: On the podium at Ellington, Carr, left, Gibson, and Pogue address the welcoming crowd.
Upon deplaning at Ellington, Carr, Gibson, and Pogue reunited with their wives, JoAnn, Julia, and Helen, respectively, whom they had not seen in three months. Director of JSC Christopher C. Kraft introduced them to the several hundred well-wishers who turned out to welcome the astronauts back to Houston.
Left: Gerald P. Carr, left, Edward G. Gibson, and William R. Pogue address reporters at their postflight press conference on Feb. 22. Middle: President Richard M. Nixon speaks to the assembled crowd at NASA’s Johnson Space Center in Houston during the ceremony where he presented the Skylab 4 astronauts, sitting on the podium with their wives, with the Distinguished Service Medal on March 20, 1974. Right: In April 1974, the Skylab 4 astronauts address the assembled employees in the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida.
The astronauts soon returned to work at JSC for a series of debriefings about their mission. During a press conference on Feb. 22, they showed a film of their experiences aboard Skylab and answered reporters’ questions. During a visit to Texas, on March 20, President Richard M. Nixon stopped at JSC to award Carr, Gibson, and Pogue the Distinguished Service Medal in a ceremony attended by thousands of employees and visitors.
Left: The Skylab 4 Command Module on display at the Oklahoma History Center in Oklahoma City. Image credit: courtesy Oklahoma History Center. Right: The Crew-1 astronauts aboard the space station talk with Skylab-4 astronaut Edward G. Gibson.
Following splashdown, the U.S.S. New Orleans delivered the CM to San Diego, from where workers trucked it to its manufacturer, the Rockwell International facility in Downey, California, for postflight inspection. NASA transferred the Skylab 4 CM to the National Air and Space Museum in 1975, where it went on display the following year when the Smithsonian Institution inaugurated its new building. After more than 40 years (1976 to 2018) on display there, in 2020, the NASM loaned the spacecraft to the Oklahoma History Center in Oklahoma City. The Skylab 4 CM held the record for the longest single flight for an American spacecraft for 47 years until Feb. 7, 2021, when the Crew Dragon Resilience flying the SpaceX Crew-1 mission to the International Space Station broke it. To commemorate the event, the four-person crew of Crew-1 held a video conference with Gibson from the space station.
Left: The Skylab 4 rescue vehicle returns to the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center (KSC) in Florida on Feb. 14, 1974. Middle: Workers in the VAB destack the Skylab rescue spacecraft Command and Service Module-119 (CSM-119) from the SA-209 Saturn IB rocket. Right: The Skylab 4 CSM-119 rescue spacecraft on display in the KSC Apollo/Saturn V Center.
The Skylab 4 SA-209 Saturn IB rocket on display at the Visitor Center’s Rocket Garden at NASA’s Kennedy Space Center in Florida. The rocket is topped with the Facility Verification Vehicle Apollo Command and Service Module.
The Skylab Rescue Vehicle’s rocket (SA-209) and spacecraft (CSM-119), on Launch Pad 39B since Dec. 3, 1973, returned to the Vehicle Assembly Building on Feb. 14, 1974. Workers destacked the vehicle, keeping the components in storage at KSC. Managers designated SA-209 and CSM-119 as the backup vehicle for the July 1975 Apollo-Soyuz Test Project. Engineers used the spacecraft to conduct lightning sensitivity testing in KSC’s Manned Spacecraft Operations Building’s high bay in September 1974. Following ASTP, NASA retired both the rocket and spacecraft, eventually putting them on display. Visitors can view the SA-209 Saturn IB in the Rocket Garden of KSC’s Visitor Center and the CSM-119 in the Apollo/Saturn V Center at KSC.
Left: Illustration of a possible Skylab reboost mission by a space shuttle. Middle: Track of Skylab’s reentry over Australia. Right: Managers, flight directors, and astronauts monitor Skylab’s reentry from Mission Control at NASA’s Johnson Space Center in Houston.
Two days before leaving Skylab, the Skylab 4 crew boosted the station into a higher 269-by-283-mile orbit, assuming it would remain in space until 1983. By then, NASA hoped that space shuttle astronauts could attach a rocket to the station to either boost it to a higher orbit or safely deorbit it over the Pacific Ocean. But delays in the shuttle program and higher than expected solar activity resulting in increased atmospheric drag on the station ultimately thwarted those plans. It became apparent that Skylab would reenter in mid-1979, forcing NASA to devise plans to control its entry point as much as possible by adjusting the station’s attitude to influence atmospheric drag. On July 11, 1979, during its 34,981st orbit around the Earth, engineers in JSC’s Mission Control sent the final command to Skylab to turn off its control moment gyros, sending it into a slow tumble in an effort to ensure that Skylab would not reenter over a populated area. Skylab’s breakup resulted in most of the debris that survived reentry falling into the Indian Ocean, with some pieces falling over sparsely populated areas of southern Western Australia.
Left: The Skylab postage stamp issued by the U.S. Postal Service. Image credit: courtesy Smithsonian National Postal Museum. Right: Skylab 2 Commander Charles “Pete” Conrad, center, accepts the Collier Trophy from Vice President Gerald R. Ford, right, as Skylab 4 Commander Gerald P. Carr, left, and Skylab 3 Commander Alan L. Bean look on.
The scientific results returned during the 171 days of human occupancy aboard Skylab remain some of the most significant in the history of spaceflight. The medical studies on the astronauts represent the first comprehensive look at the human body’s response to long-duration spaceflight. The ATM solar telescopes took more than 170,000 images for astronomers, while Earth scientists received 46,000 photographs. The Skylab program received many accolades. The U.S. Postal Service honored it by releasing a stamp in the program’s honor on May 14, 1974, the 1-year anniversary of Skylab’s launch. The National Aviation Association awarded its prestigious Robert J. Collier Trophy to the nine Skylab astronauts and to Skylab Program Director William C. Schneider for “proving beyond question the value of man in future explorations of space and the production of data of benefit to all the people on Earth.” Vice President Gerald R. Ford presented the award on June 4, 1974.
Left: The Skylab backup flight unit on display at the Smithsonian Institution’s National Air and Space Museum in Washington, D.C. Image credit: courtesy NASM. Right: The Skylab trainer on display at Space Center Houston.
Possible plans for launching the Skylab backup flight unit never materialized due to budget constraints. That unit is on display at the Smithsonian Institution’s National Air and Space Museum in Washington, D.C. The training units of the various Skylab modules are on display at Space Center Houston, JSC’s official visitors center.
Left: Soviet cosmonauts Georgi M. Grechko, left, and Yuri V. Romanenko during their record-breaking 96-day mission aboard Salyut 6. Right: NASA astronaut Norman E. Thagard during his American record-breaking 115-day flight aboard Mir.
As for the record for longest spaceflight, Skylab 4’s 84-day mark held for four years, when Soviet cosmonauts Yuri V. Romanenko and Georgi M. Grechko surpassed it, spending 96 days aboard the Salyut 6 space station from December 1977 to March 1978. As an American record it held up longer, broken by NASA astronaut Norman E. Thagard during his 115-day flight aboard the Russian space station Mir between March and July 1995. Operational lessons learned from Skylab proved invaluable for the Shuttle-Mir and International Space Station programs.
