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By NASA
ESA (European Space Agency) astronaut Samantha Cristoforetti pictured aboard the International Space Station on Dec. 20, 2014, during Expedition 42.Credit: NASA Crew members aboard the International Space Station celebrate the holiday season in a unique way while living and working at the orbiting laboratory. Each crew member, including the current Expedition 72, spends time enjoying the view of Earth from the space station, privately communicating with their friends and families, and sharing a joint meal with their expedition crewmates, while continuing experiments and station maintenance.
This view of the rising Earth greeted the Apollo 8 astronauts William Ander, Frank Borman, and James Lovell on Dec. 24, 1968, as they approached from behind the Moon after the fourth nearside lunar orbit.Credit: NASA As the first crew to spend Christmas in space and leave Earth orbit, Apollo 8 astronauts Frank Borman, James Lovell, and William Anders, celebrated while circling the Moon in December 1968. The crew commemorated Christmas Eve by reading opening verses from the Bible’s Book of Genesis as they broadcast scenes of the lunar surface below. An estimated one billion people across 64 countries tuned in to the crew’s broadcast.
Skylab 4 astronauts Gerald Carr, Edward Gibson, and William Pogue trim their homemade Christmas tree in December 1973. Credit: NASA In 1973, Skylab 4 astronauts Gerald Carr, Edward Gibson, and William Pogue celebrated Thanksgiving, Christmas, and New Year’s in space, as the first crew to spend the harvest festival and ring in the new year while in orbit. The crew built a homemade tree from leftover food containers, used colored decals as decorations, and topped it with a cardboard cutout in the shape of a comet. Carr and Pogue conducted a seven-hour spacewalk to change out film canisters and observe the passing Comet Kohoutek on Dec. 15, 1973. Once back inside the space station, the crew enjoyed a holiday dinner complete with fruitcake, communicated with their families, and opened presents.
NASA astronaut Jeffrey Hoffman pictured with a dreidel during Hanukkah in December 1993.Credit: NASA After NASA launched the agency’s Hubble Space Telescope into Earth’s orbit in 1990, NASA sent a space shuttle crew on a mission, STS-61, to service the telescope. In 1993, NASA astronaut Jeffrey Hoffman celebrated Hanukkah after completing the third spacewalk of the servicing mission. Hoffman celebrated with a traveling menorah and dreidel.
STS103-340-036 (19-27 December 1999) — Wearing Santa hats, astronauts John M. Grunsfeld and Steven L. Smith blend with the season for a brief celebration on the mid deck of the Space Shuttle Discovery. The interruption was very brief as the two mission specialists shortly went about completing their suit-up process in order to participate in STS-103 space walk activity, performing needed work on the Hubble Space Telescope (HST).Credit: NASA As NASA continued to support another Hubble Space Telescope servicing mission, the STS-103 crew celebrated the first space shuttle Christmas aboard Discovery in 1999. NASA astronauts Curtis Brown, Scott Kelly, Steven Smith, John Grunsfeld, and Michael Foale, along with ESA (European Space Agency) astronauts Jean-François Clervoy and Claude Nicollier enjoyed duck foie gras on Mexican tortillas, cassoulet, and salted pork with lentils. Smith and Grunsfeld completed repairs on the telescope during a spacewalk on Dec. 24, 1999, and at least one American astronaut has celebrated Christmas in space every year since.
Expedition 1 crew members Yuri Gidzenko of Roscosmos, left, NASA astronaut William Shepherd, and Sergei Krikalev of Roscosmos reading a Christmas message in December 2000.
Credit: NASA In November 2000, the arrival of Expedition 1 crew members, NASA astronaut William Shepherd and Roscosmos cosmonauts Yuri Gidzenko and Sergei Krikalev, aboard the International Space Station, marked the beginning of a continuous presence in space. As the first crew to celebrate the holiday season at the laboratorial outpost, they began the tradition of reading a goodwill message to those back on Earth. Shepherd honored a naval tradition of writing a poem as the first entry of the new year in the ship’s log.
For more than 24 years, NASA has supported a continuous U.S. human presence aboard the International Space Station, through which astronauts have learned to live and work in space for extended periods of time. As NASA supports missions to and from the station, crew members have continued to celebrate the holidays in space.
Expedition 4 crew members, NASA astronauts Daniel Bursch and Carl Walz, along with Roscosmos cosmonaut Yuri Onufriyenko, pose for a Christmas photo in December 2001. Credit: NASA Expedition 8 crew members, NASA astronaut Michael Foale, left, and Roscosmos cosmonaut Aleksandr Kaleri, right, celebrate Christmas in December 2003. Credit: NASA Expedition 10 crew members, Roscosmos cosmonaut Salizhan Sharipov, left, and NASA astronaut Leroy Chiao, right, celebrate New Year’s Eve in December 2004.Credit: NASA Expedition 12 crew members, Roscosmos cosmonaut Tokarev, left, and NASA astronaut William McArthur, pose with Christmas stockings in December 2005. NASA Expedition 14 crew members, Roscosmos cosmonaut Mikhail Tyurin, left, and NASA astronauts Michael Lopez-Alegria and Suni Williams pose wearing Santa hats in December 2006.Credit: NASA Expedition 16 crew members, Roscosmos cosmonaut Yuri Malenchenko, left, and NASA astronauts Peggy Whitson and Daniel Tani, with Christmas stockings and presents in December 2007. Expedition 18 crew members enjoy Christmas dinner in December 2008. Expedition 22 crew members gather around the dinner table in December 2009.Credit: NASA Expedition 26 crew members celebrates New Year’s Eve in December 2010.Credit: NASA Expedition 30 crew members pictured in December 2011.Credit: NASA Expedition 34 crew members pictured in December 2012. Credit: NASA Expedition 42 crew members leave milk and cookies for Santa and hang stockings using the airlock as a makeshift chimney in December 2013.Credit: NASA Expedition 50 crew members celebrate New Year’s Eve in December. Credit: NASA Expedition 54 crew member NASA astronaut Mark Vande Hei pictured as an elf for Christmas in December 2017.Credit: NASA Expedition 58 crew members inspect stockings for presents in December 2018 Expedition 61 crew member NASA astronaut Jessica Meir pictured with Hanukkah-themed socks in the cupola in December 2019. Expedition 61 crew members NASA astronauts Andrew Morgan, Christina Koch, and Jessica Meir, along with ESA (European Space Agency) astronaut Luca Parmitano share a holiday message on Dec. 23, 2019, from the International Space Station.Credit: NASA NASA astronaut Kayla Barron pictured with presents she wrapped for her crewmates in December 2021.Credit: NASA Expedition 68 crew members wear holiday outfits in December 2022.Credit: NASA Expedition 70 flight engineer NASA astronaut Jasmin Moghbeli’s husband and daughters made a felt menorah for her to celebrate Hanukkah during her mission. Since astronauts can’t light real candles aboard the space station, Moghbeli pinned felt “lights” for each night of the eight-day holiday. A dreidel spun in weightlessness will continue spinning until it comes in contact with another object but can’t land on any of its four faces. Expedition 70 crew members recorded a holiday message for those back on Earth.
Expedition 70 NASA astronaut Jasmin Moghbeli’s felt menorah and dreidel that she used to celebrate Hanukkah in December 2023. Credit: NASA NASA astronauts Don Pettit and Suni Williams, Expedition 72 flight engineer and commander respectively, pose for a fun holiday season portrait while speaking on a ham radio inside the International Space Station’s Columbus laboratory module. Credit: NASA To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video
Expedition 72 video holiday message from the International Space Station. Credit: NASA The International Space Station is a convergence of science, technology, and human innovation that enables research not possible on Earth. The orbiting laboratory is a springboard for developing a low Earth economy and NASA’s next great leaps in exploration, including missions to the Moon under the Artemis campaign and, ultimately, human exploration of Mars.
Go here for more holiday memories onboard the space station. To learn more about the International Space Station, its research, and its crew, at:
https://www.nasa.gov/station
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Claire O’Shea
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claire.a.o’shea@nasa.gov
Sandra Jones
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
A crane lowers the steel reflector framework for Deep Space Station 23 into position Dec. 18 on a 65-foot-high (20-meter) platform above the antenna’s pedestal that will steer the reflector. Panels will be affixed to the structure create a curved surface to collect radio frequency signals.NASA/JPL-Caltech After the steel framework of the Deep Space Station 23 reflector dish was lowered into place on Dec. 18, a crew installed the quadripod, a four-legged support structure that will direct radio frequency signals from deep space that bounce off the main reflector into the antenna’s receiver.NASA/JPL-Caltech Deep Space Station 23’s 133-ton reflector dish was recently installed, marking a key step in strengthening NASA’s Deep Space Network.
NASA’s Deep Space Network, an array of giant radio antennas, allows agency missions to track, send commands to, and receive scientific data from spacecraft venturing to the Moon and beyond. NASA is adding a new antenna, bringing the total to 15, to support increased demand for the world’s largest and most sensitive radio frequency telecommunication system.
Installation of the latest antenna took place on Dec. 18, when teams at NASA’s Goldstone Deep Space Communications Complex near Barstow, California, installed the metal reflector framework for Deep Space Station 23, a multifrequency beam-waveguide antenna. When operational in 2026, Deep Space Station 23 will receive transmissions from missions such as Perseverance, Psyche, Europa Clipper, Voyager 1, and a growing fleet of future human and robotic spacecraft in deep space.
“This addition to the Deep Space Network represents a crucial communication upgrade for the agency,” said Kevin Coggins, deputy associate administrator of NASA’s SCaN (Space Communications and Navigation) program. “The communications infrastructure has been in continuous operation since its creation in 1963, and with this upgrade we are ensuring NASA is ready to support the growing number of missions exploring the Moon, Mars, and beyond.”
This time-lapse video shows the entire day of construction activities for the Deep Space Station 23 antenna at the NASA Deep Space Network’s Goldstone Space Communications Complex near Barstow, California, on Dec. 18. NASA/JPL-Caltech Construction of the new antenna has been under way for more than four years, and during the installation, teams used a crawler crane to lower the 133-ton metal skeleton of the 112-foot-wide (34-meter-wide) parabolic reflector before it was bolted to a 65-foot-high (20-meter-high) alidade, a platform above the antenna’s pedestal that will steer the reflector during operations.
“One of the biggest challenges facing us during the lift was to ensure that 40 bolt-holes were perfectly aligned between the structure and alidade,” said Germaine Aziz, systems engineer, Deep Space Network Aperture Enhancement Program of NASA’s Jet Propulsion Laboratory in Southern California. “This required a meticulous emphasis on alignment prior to the lift to guarantee everything went smoothly on the day.”
Following the main lift, engineers carried out a lighter lift to place a quadripod, a four-legged support structure weighing 16 1/2 tons, onto the center of the upward-facing reflector. The quadripod features a curved subreflector that will direct radio frequency signals from deep space that bounce off the main reflector into the antenna’s pedestal, where the antenna’s receivers are housed.
In the early morning of Dec. 18, a crane looms over the 112-foot-wide (34-meter-wide) steel framework for Deep Space Station 23 reflector dish, which will soon be lowered into position on the antenna’s base structure.NASA/JPL-Caltech Engineers will now work to fit panels onto the steel skeleton to create a curved surface to reflect radio frequency signals. Once complete, Deep Space Station 23 will be the fifth of six new beam-waveguide antennas to join the network, following Deep Space Station 53, which was added at the Deep Space Network’s Madrid complex in 2022.
“With the Deep Space Network, we are able to explore the Martian landscape with our rovers, see the James Webb Space Telescope’s stunning cosmic observations, and so much more,” said Laurie Leshin, director of JPL. “The network enables over 40 deep space missions, including the farthest human-made objects in the universe, Voyager 1 and 2. With upgrades like these, the network will continue to support humanity’s exploration of our solar system and beyond, enabling groundbreaking science and discovery far into the future.”
NASA’s Deep Space Network is managed by JPL, with the oversight of NASA’s SCaN Program. More than 100 NASA and non-NASA missions rely on the Deep Space Network and Near Space Network, including supporting astronauts aboard the International Space Station and future Artemis missions, monitoring Earth’s weather and the effects of climate change, supporting lunar exploration, and uncovering the solar system and beyond.
For more information about the Deep Space Network, visit:
https://www.nasa.gov/communicating-with-missions/dsn
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Ian J. O’Neill
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-2649
ian.j.oneill@jpl.nasa.gov
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By NASA
A method for evaluating thermophysical properties of metal alloys
Simulation of the solidification of metal alloys, a key step in certain industrial processes, requires reliable data on their thermophysical properties such as surface tension and viscosity. Researchers propose comparing predictive models with experimental outcomes as a method to assess these data.
Scientists use data on surface tension and viscosity of titanium-based alloys in industrial processes such as casting and crystal growth. Non-Equilibrium Solidification, Modelling for Microstructure Engineering of Industrial Alloys, an ESA (European Space Agency) investigation, examined the microstructure and growth of these alloys using the station’s Electromagnetic Levitator. This facility eliminates the need for containers, which can interfere with experiment results.
European Space Agency (ESA) astronaut Alexander Gerst is shown in the Columbus module of the International Space Station during the installation of the Electromagnetic Levitator.ESA/Alexander Gerst Overview of techniques for measuring thermal diffusion
Researchers present techniques for measuring thermal diffusion of molecules in a mixture. Thermal diffusion is measured using the Soret coefficient – the ratio of movement caused by temperature differences to overall movement within the system. This has applications in mineralogy and geophysics such as predicting the location of natural resources beneath Earth’s surface.
A series of ESA investigations studied diffusion, or how heat and particles move through liquids, in microgravity. Selectable Optical Diagnostics Instrument-Influence of VIbrations on DIffusion of Liquids examined how vibrations affect diffusion in mixtures with two components and SODI-DCMIX measured more-complex diffusion in mixtures of three or more components. Understanding and predicting the effects of thermal diffusion has applications in various industries such as modeling of underground oil reservoirs.
NASA astronaut Kate Rubins works on Selectable Optical Diagnostics Instrument Experiment Diffusion Coefficient Mixture-3 (SODI) DCMix-3 installation inside the station’s Microgravity Science Glovebox.JAXA (Japan Aerospace Exploration Agency)/Takuya Onishi Research validates ferrofluid technology
Researchers validated the concept of using ferrofluid technology to operate a thermal control switch in a spacecraft. This outcome could support development of more reliable and long-lasting spacecraft thermal management systems, increasing mission lifespan and improving crew safety.
Überflieger 2: Ferrofluid Application Research Goes Orbital analyzed the performance of ferrofluids, a technology that manipulates components such as rotors and switches using magnetized liquids and a magnetic field rather than mechanical systems, which are prone to wear and tear. This technology could lower the cost of materials for thermal management systems, reduce the need for maintenance and repair, and help avoid equipment failure. The paper discusses possible improvements to the thermal switch, including optimizing the geometry to better manage heat flow.
A view of the Ferrofluid Application Research Goes Orbital investigation hardware aboard the International Space Station. UAE (United Arab Emirates)/Sultan AlneyadiView the full article
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By NASA
“Trying to do stellar observations from Earth is like trying to do birdwatching from the bottom of a lake.” James B. Odom, Hubble Program Manager 1983-1990.
The third servicing mission to the Hubble Space Telescope, placed in orbit in 1990, occurred during the STS-103 mission in December 1999. During the mission, originally planned for June 2000 but accelerated by six months following unexpected failures of the telescope’s attitude control gyroscopes, the astronauts restored the facility to full functionality. During their eight-day mission that featured the first space shuttle crew to spend Christmas in space, the seven-member U.S. and European crew rendezvoused with and captured Hubble, and four astronauts in rotating teams of two conducted three lengthy and complex spacewalks to service and upgrade the telescope. They redeployed the telescope with greater capabilities than ever before to continue its mission to help scientists unlock the secrets of the universe.
Schematic showing the Hubble Space Telescope’s major components. Workers inspect the Hubble Space Telescope’s 94-inch diameter primary mirror prior to assembly. Astronauts release the Hubble Space Telescope in April 1990 during the STS-31 mission. The discovery after the Hubble Space Telescope’s launch in 1990 that its primary mirror suffered from a flaw called spherical aberration disappointed scientists who could not obtain the sharp images they had expected. But thanks to the Hubble’s built-in feature of on-orbit servicing, NASA devised a plan to correct the telescope’s optics during the first planned repair mission in 1993. A second servicing mission in 1997 upgraded the telescope’s capabilities until the next mission planned for three years later. But after three of the telescope’s six gyroscopes failed in 1997, 1998, and 1999, mission rules dictated a call up mission in case additional gyroscope failures sent Hubble into a safe mode. NASA elected to move up some of the servicing tasks from the third mission, splitting it into missions 3A and 3B, planning to fly 3A in October 1999 on Discovery’s STS-103 mission primarily to replace the failed gyroscopes. Delays to the shuttle fleet resulting from anomalies during the launch of STS-93 in July 1993 slipped STS-103 first into November and ultimately into December. Technical issues with Discovery itself pushed the launch date to mid-December, and raised concerns about having a shuttle in orbit during the Y2K transition. Once the launch had slipped to Dec. 19, mission planners cut the mission from 10 to eight days, deleting one of the four spacewalks, to ensure a return before the end of the calendar year. The servicing mission couldn’t come soon enough, as a fourth gyroscope failed aboard Hubble in mid-November, with Discovery already poised on the launch pad to prepare for STS-103. Controllers placed Hubble in a safe mode until the astronauts arrived.
The STS-103 crew of C. Michael Foale, left, Claude Nicollier, Scott J. Kelly, Curtis L. Brown, Jean-François A. Clervoy, John M. Grunsfeld, and Steven L. Smith. The STS-103 crew patch. The mission patch for the Hubble Servicing Mission-3A. To execute the third Hubble Servicing Mission, in July 1998 NASA selected an experienced four-person team to carry out a record-breaking six spacewalks on the flight then planned for June 2000. The spacewalkers included Mission Specialists Steven L. Smith serving as payload commander, John M. Grunsfeld, C. Michael Foale, and European Space Agency (ESA) astronaut Claude Nicollier from Switzerland. The addition in March 1999 of Commander Curtis L. Brown, Pilot Scott J. Kelly, and Mission Specialist ESA astronaut Jean-François A. Clervoy of France rounded out the highly experienced crew with 18 previous spaceflights among them. Brown earned the distinction as only the fifth person to fly in space six times. For Kelly, STS-103 marked his first spaceflight. Smith, Clervoy, and Grunsfeld each had flown two previous missions, Foale four including a long-duration mission aboard Mir, and Nicollier three. Smith participated in three spacewalks during the second Hubble Servicing Mission and Nicollier served as the Remote Manipulator System (RMS) or robotic arm operator during the first.
The STS-103 crew at the traditional prelaunch breakfast at NASA’s Kennedy Space Center in Florida. Suited up, the STS-103 astronauts leave crew quarters for the trip to Launch Pad 39B. Space shuttle Discovery on Launch Pad 39B, awaiting launch. Discovery arrived back to KSC at the end of the STS-96 mission on June 6, 1999, and workers towed it to the Orbiter Processing Facility the same day to begin readying it for STS-103. The vehicle rolled over to the Vehicle Assembly Building on Nov. 4, where workers mated it with its external tank and twin solid rocket boosters, before rolling the stack out to Launch Pad 39B on Nov. 13.
Liftoff of space shuttle Discovery on the STS-103 Hubble Space Telescope servicing mission 3A. The Hubble Space Telescope as Discovery approaches. The STS-103 crew berthing the Hubble into the payload bay. Beginning its 27th trip into space, Discovery lifted off from Launch Pad 39B at 7:50 p.m. EST on Dec. 19 to fix the ailing space telescope. Two days later, Brown and Kelly maneuvered Discovery to within range of Hubble so Clervoy operating the 50-foot-long RMS could grapple the telescope and berth it into the payload bay.
During the first spacewalk, astronauts John M. Grunsfeld, left, and Steven L. Smith replacing one of the Rate Sensor Units containing two gyroscopes. Smith gives a thumbs up with his image reflected in the Hubble Space Telescope. Smith and Grunsfeld conducted the mission’s first spacewalk on Dec. 22, the flight’s fourth day in space. The duo, aided by Clervoy operating the RMS from inside Discovery, completed two of mission’s highest priority objectives. They replaced the failed gyroscopes, installing three new Rate Sensor Units, each containing two gyroscopes, to return control to the ailing telescope. They also installed six Voltage/Temperature Improvement Kits to prevent the telescope’s batteries from overheating as they aged. The excursion lasted eight hours 15 minutes, at the time the second longest spacewalk.
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.
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