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By NASA
Northrop Grumman’s Cygnus cargo craft awaits its capture by the International Space Stations’ Canadarm2 robotic arm, commanded by NASA astronaut Matthew Dominick on Aug. 6, 2024.Credit: NASA NASA’s Northrop Grumman Commercial Resupply Services 23, or Northrop Grumman CRS-23, will deliver more than 11,000 pounds of science and supplies to the International Space Station. This mission will be the first flight of the Cygnus XL, the larger, more cargo-capable version of the company’s solar-powered spacecraft.
The Cygnus XL will launch on a SpaceX Falcon 9 rocket from the Cape Canaveral Space Force Station in Florida. Following arrival, astronauts aboard the space station will use the Canadarm2 to grapple Cygnus XL before robotically installing the spacecraft to the Unity module’s Earth-facing port for cargo unloading. Stream live launch and arrival coverage on NASA+, Amazon Prime, YouTube.
Mission Infographics
NASA’s Northrop Grumman 23 commercial resupply mission will launch on a SpaceX Falcon 9 rocket to deliver research and supplies to the International Space Station.NASA NASA’s Northrop Grumman 23 commercial resupply mission will launch from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.NASA NASA selected William “Willie” McCool as an astronaut in 1996. McCool flew as a pilot on STS-107, his first mission. The STS-107 crew, including McCool, died on February 1, 2003, when space shuttle Columbia was lost during reentry over east Texas at about 9 a.m. EST, 16 minutes prior to the scheduled touchdown and NASA’s Kennedy Space Center. NASA’s Northrop Grumman 23 spacecraft is named in his honor.NASA NASA astronauts Jonny Kim and Zena Cardman will be on duty during the Cygnus spacecraft’s approach and rendezvous. Kim will be at the controls of the Canadarm2 robotic arm ready to capture Cygnus as Cardman monitors the vehicle’s arrival.NASA Mission Hardware
IDA Planar Reflector – This is a reflective element used by visiting spacecraft during docking. The spacecraft bounces a laser off the reflector to compute relative range, velocity, and attitude on approach to the International Space Station. Due to degradation found on the installed reflector, this unit will launch to support a future spacewalk to replace the damaged reflector.
Urine Processing Assembly (UPA) Distillation Assembly – The urine processor on the space station uses filtration and distillation to separate water from wastewater to produce potable water. This unit is launching as a spare.
Reactor Health Sensor – Part of the Environmental Control and Life Support System – Water Processing Assembly, includes two sensors with inlet and outlet ports to measure reactor health. This unit is being launched as a spare.
Pressure Management Device – This is an intravehicular activity system for performing pressurization and depressurization of the space station vestibules between the space station hatch and the hatch of a visiting spacecraft or other module, like the NanoRacks Airlock. During depressurization, most of the air will be added to the space station cabin air to save the valuable resource.
Air Selector Valve – This electro-mechanical assembly is used to direct airflow through the Carbon Dioxide Removal Assembly. Two units are launching as spares.
Major Constituent Analyzer Mass Spectrometer Assembly – This assembly monitors the partial pressure levels of nitrogen, oxygen, hydrogen, methane, water vapor, and carbon dioxide aboard station. This unit is launching as a contingency spare.
Major Constituent Analyzer Mass Sample/Series Pump Assembly – This contains plumbing and a pair of solenoid valves to direct sample gas flow to either of the redundant sample pumps. It draws sample gas from the space station’s atmosphere into the analyzer. This unit is launching as a contingency spare.
Major Constituent Analyzer Sample Distribution Assembly – This isolates the gas sample going to the Mass Spectrometer Assembly. The purpose is to distribute gas samples throughout the analyzer. This unit is launching as a contingency spare.
Charcoal Bed – The bed allows the Trace Contaminant Control System to remove high molecular weight contaminants from the station’s atmosphere. This unit is launching as a spare.
Common Cabin Air Assembly Heat Exchanger – This assembly controls cabin air temperature, humidity, and airflow aboard the space station. This unit is launching as a spare.
Sequential Shunt Unit – This regulates the solar array wing voltage when experiencing high levels of direct sunlight; in doing so, it provides usable power to the station’s primary power system. This unit is launching as a spare.
Solid State Lighting Assembly – This is a specialized internal lighting assembly aboard station. NASA will use one lighting assembly to replace a failed unit and will keep the others as spares.
Remote Power Control Module Type V – This module distributes 120V/DC electrical power and provides current-limiting and fault protection to secondary loads aboard the orbiting laboratory. This module is launching as a spare.
Treadmill Isolator Assembly – The Upper, X, Y, and Z Isolator Assemblies are launching as spares for the space station’s treadmill, where they work together to reduce vibration and force transfer when astronauts are running.
Pump Fan Motor Controller – The controller is an electronic controller to modulate the power to the motor windings, which are coils of conductive wire that are wrapped around its core carrying electric current to drive the motor. Windings are commonly used in household appliances, cars (power steering), pumps, and more.
Quick Don Mask Assembly – This mask is used by the crew, along with the Pre-Breath Assembly, in emergency situations. This unit is launching to replace a unit aboard station.
Anomaly Gas Analyzer – This analyzer senses various gases, like oxygen, carbon dioxide, carbon monoxide, ammonia, and others, along with cabin pressure, water vapor and temperature. Two units are launching as an upgrade to the current analyzer system used on board.
Nitrogen, Oxygen Resupply Maintenance Kit – One tank of nitrogen and one tank of oxygen used for gas replenishment aboard the space station are launching to maintain gas reserves.
Crew and Equipment Translation Aid Luminaire – This is a lighting unit used aboard station to illuminate the astronauts’ equipment cart and surrounding work areas during spacewalks.
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By NASA
NASA astronaut and Expedition 68 Flight Engineer Frank Rubio is pictured inside the cupola, the International Space Station’s “window to the world,” as the orbiting lab flew 263 miles above southeastern England on Oct. 1, 2022.NASA/Frank Rubio NASA astronaut Frank Rubio poses for a picture in the International Space Station’s cupola on Oct. 1, 2022.
Rubio was selected as a NASA astronaut in 2017. He trained as a flight engineer and member of the Expedition 68 crew. Rubio, along with cosmonauts Sergey Prokopyev and Dmitry Petelin of Roscosmos, launched Sept. 21, 2022, on the Soyuz MS-22 spacecraft from the Baikonur Cosmodrome in Kazakhstan to the space station.
While aboard the orbital laboratory, Rubio and his fellow crew members conducted dozens of scientific investigations and technology demonstrations, including growing tomato plants to study hydroponic and aeroponic techniques, participating in crew health experiments, and studying how materials react in microgravity. Research like this and other activity on the orbital outpost will inform long-duration missions like Artemis and future human expeditions to Mars.
Rubio spent 371 days in space, surpassing NASA’s single spaceflight record for continuous days in space made by astronaut Mark Vande Hei. Rubio and his crewmates landed in Kazakhstan on Sept. 27, 2023. Rubio’s mission is the longest single spaceflight by a U.S. astronaut in history.
Image credit: NASA/Frank Rubio
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By NASA
NASA astronaut and Expedition 65 Flight Engineer Megan McArthur removes Kidney Cells-02 hardware inside the Space Automated Bioproduct Laboratory and swaps media inside the Microgravity Science Glovebox. The human research study seeks to improve treatments for kidney stones and osteoporosis NASA astronaut Megan McArthur has retired, concluding a career spanning more than two decades. A veteran of two spaceflights, McArthur logged 213 days in space, including being the first woman to pilot a SpaceX Dragon spacecraft and the last person to “touch” the Hubble Space Telescope with the space shuttle’s robotic arm.
McArthur launched as pilot of NASA’s SpaceX Crew-2 mission in April 2021, marking her second spaceflight and her first long-duration stay aboard the International Space Station. During the 200-day mission, she served as a flight engineer for Expeditions 65/66, conducting a wide array of scientific experiments in human health, materials sciences, and robotics to advance exploration of the Moon under Artemis and prepare to send American astronauts to Mars.
Her first spaceflight was STS-125 in 2009, aboard the space shuttle Atlantis, the fifth and final servicing mission to Hubble. As a mission specialist, she was responsible for capturing the telescope with the robotic arm, as well as supporting five spacewalks to update and repair Hubble after its first 19 years in space. She also played a key role in supporting shuttle operations during launch, rendezvous with the telescope, and landing.
“Megan’s thoughtful leadership, operational excellence, and deep commitment to science and exploration have made a lasting impact,” said Steve Koerner, acting director of NASA’s Johnson Space Center in Houston. “Her contributions have helped shape the future of human space exploration, and we are incredibly grateful for her service.”
In addition to her flight experience, McArthur has served in various technical and leadership roles within NASA. In 2019, she became the deputy division chief of the Astronaut Office, supporting astronaut training, development, and ongoing spaceflight operations. She also served as the assistant director of flight operations for the International Space Station Program starting in 2017.
Since 2022, McArthur has served as the chief science officer at Space Center Houston, NASA Johnson’s official visitor center. Continuing in this role, she actively promotes public engagement with space exploration themes, aiming to increase understanding of the benefits to humanity and enhance science literacy.
“Megan brought a unique combination of technical skill and compassion to everything she did,” said Joe Acaba, chief of the Astronaut Office at NASA Johnson. “Whether in space or on the ground, she embodied the best of what it means to be an astronaut and a teammate. Her contributions will be felt by the next generation of explorers she helped train.”
McArthur was born in Honolulu and raised as a “Navy kid” in many different locations worldwide. She earned a Bachelor of Science in aerospace engineering from the University of California, Los Angeles, and a doctorate in oceanography from the Scripps Institution of Oceanography at the University of California, San Diego. Before being selected as an astronaut in 2000, she conducted oceanographic research focusing on underwater acoustics, which involved shipboard work and extensive scuba diving.
McArthur is married to former NASA astronaut Robert Behnken, who also flew aboard the Dragon Endeavour spacecraft during the agency’s SpaceX Demo-2 mission in 2020.
“It was an incredible privilege to serve as a NASA astronaut, working with scientists from around the world on cutting-edge research that continues to have a lasting impact here on Earth and prepares humanity for future exploration at the Moon and Mars,” said McArthur. “From NASA’s Hubble Space Telescope to the International Space Station, our research lab in low Earth orbit, humanity has developed incredible tools that help us answer important scientific questions, solve complex engineering challenges, and gain a deeper understanding of our place in the universe. Seeing our beautiful planet from space makes it so clear how fragile and precious our home is, and how vital it is that we protect it. I am grateful I had the opportunity to contribute to this work, and I’m excited to watch our brilliant engineers and scientists at NASA conquer new challenges and pursue further scientific discoveries for the benefit of all.”
To learn more about NASA’s astronauts and their contributions to space exploration, visit:
https://www.nasa.gov/astronauts
-end-
Shaneequa Vereen
Johnson Space Center, Houston
281-483-5111
shaneequa.y.vereen@nasa.gov
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By NASA
NASA/Josh Valcarcel NASA astronaut Zena Cardman poses for a portrait in a photography studio on March 22, 2024, at NASA’s Johnson Space Center in Houston, Texas.
Cardman is currently aboard the International Space Station, where she perform research, technology demonstrations, and maintenance activities. Recently, she took a robotics test on a computer for the portion of the CIPHER study that measures space-caused changes to her brain structure and function; she also installed high-definition cameras on a spacesuit helmet.
Cardman launched to the space station on NASA’s SpaceX Crew-11 mission. Members of Crew-11 will contribute to NASA’s Artemis campaign by simulating Moon landing scenarios that future crews may encounter near the lunar South Pole.
Learn more about station activities by following the space station blog.
Image credit: NASA/Josh Valcarcel
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By NASA
Titans Space Industries, a commercial space company, selected a new cohort of astronaut candidates this spring – and among them is NASA citizen scientist, Benedetta Facini. She has participated in not one, but many NASA citizen science projects: Cloudspotting on Mars, Active Asteroids, Daily Minor Planet, GLOBE, Exoasteroids and International Astronomical Collaboration (IASC). We asked her a few questions about her work with NASA and her path to becoming an astronaut candidate.
Benedetta Facini visiting Kennedy Space Center in 2023 Credit: B.F. Q: How did you learn about NASA Citizen Science?
A: Through colleagues and social media, I often came across people talking about Citizen Science, and this immediately caught my curiosity. I did some online research on the subject, and I asked some colleagues already involved in it. Finally, I managed to find the way to participate by exploring the programs offered by NASA Citizen Science, which impressed me with their variety.
Q: What would you say you have gained from working on these NASA projects?
A: Curiosity in discovering new things and a lot of patience: many projects indeed require attention and, as mentioned, patience. I was pleased to discover that even NASA relies on “ordinary people” to carry out research, giving them the opportunity to learn new things using simple tools.
I also gained hands-on experience in analyzing real data and identifying celestial objects to contribute to real research efforts. My favorite part was to learn to recognize the pattern of clouds in data collected by the Mars Climate Sounder on the Mars Reconnaissance Orbiter.
I have learned the importance of international collaboration: I know many citizen scientists now, and interacting with them teaches me a lot every day.
Q. What do you do when you’re not working on citizen science?
A: I am a student and a science communicator. I share my knowledge and enthusiasm through social media, schools, webinars around the world, and space festivals across Italy where I have the opportunity to engage with a wide audience, from young students to adults.
Recently, I achieved a major milestone: I was selected as an Astronaut Candidate by the commercial space company, Titans Space Industries. I am thrilled to soon begin the basic training, which marks the first step toward realizing my dream of becoming an astronaut and contributing directly to human spaceflight and scientific research.
Q. What do you need to do to become an astronaut?
A: Gain as much experience as possible. During astronaut selection, not only academic achievements are evaluated, but also professional and personal experiences.
Every skill can be useful during the selection process: the ability to work in a team, which is essential during space missions; survival skills; experience as a diver, skydiver, or pilot; knowledge of other languages; and the ability to adapt to different situations.
I would also like to debunk a myth: you don’t need to be Einstein and fit as an Olympic level athlete; you just need to be good at what you do and be healthy.
Q: How has citizen science helped you with your career?
A: Citizen Science was very helpful for my career as a science communicator, as it gave me the opportunity to show people that anyone can contribute to the space sector. At the same time, it has allowed me to become a mentor and a point of reference for many students (mainly with the IASC project).
The hands-on experience I gained in analyzing real data was also very helpful for my academic career, too. I had never had real data to work with before, and this experience proved extremely valuable for the practical courses in my physics degree program.
Q. Do you have any advice you’d like to share for other citizen scientists or for people who want to become astronauts?
A: For other citizen scientists my advice is to stay curious and persistent.
Don’t be afraid to ask for help and interact with other colleagues because the goal of the NASA Citizen Science program is international collaboration and every small contribution can make a difference.
For aspiring astronauts, my advice is to gain as much experience as possible. Academic results are important but hands-on skills, teamwork, adaptability, and real experiences are also important.
Stay passionate and never lose your curiosity; the astronaut path is challenging; don’t give up after an eventual first rejection. You will always meet people trying to make you change your mind and your dream, even people from your family, but don’t stop in front of obstacles. The greatest regret is knowing you didn’t try to make your dream come true.
Quoting my inspiration, Italian astronaut Paolo Nespoli: “You need to have the ability and the courage to dream of impossible things. Everyone can dream of things that are possible. Dream of something impossible, one of those things that, when you say it out loud, people look at you and say: “Sure, study hard and you’ll make it,” but deep down no one really believes it. Those are the impossible things that are worth trying to do!”
Q: Thank you for sharing your story with us! Is there anything else you would like to add?
A: I would like to thank the team behind NASA Citizen Science.
These projects play a crucial role in keeping students’ passion for science alive and guiding them toward a potential career in this field.
Knowing that I have contributed to helping scientists is incredibly motivating and encourages me and students around the world to keep going, stay curious, and continue pursuing our path in the science field.
The opportunity to participate in these projects while learning is inspiring and it reinforces the idea that everyone, regardless of their background, can make a real impact in the scientific community.
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Last Updated Aug 25, 2025 Related Terms
Astrophysics Citizen Science Earth Science Planetary Science Explore More
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