For more information, contact Jonathan E. Jones, Langley Research Center, jonathan.e.jones@nasa.gov Download the PDF version The purpose of this Technical Bulletin is to communicate the risks associated with freeze–thaw cycles in hydrazine monopropellant systems and to provide general recommendations for mitigating damage, operational hazards, and loss of system reliability in propulsion and auxiliary hydrazine systems. [...]
Explore Hubble Hubble Home Overview About Hubble The History of Hubble Hubble Timeline Why Have a Telescope in Space? Hubble by the Numbers At the Museum FAQs Impact & Benefits Hubble’s Impact & Benefits Science Impacts Cultural Impact Technology Benefits Impact on Human Spaceflight Astro Community Impacts Science Hubble Science Science Themes Science Highlights [...]
APOD Science APOD APOD: 2026 September 23 – A… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. AfterBefore [...]
Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Perseverance Rover Mars Curiosity Rover Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 3 min read Curiosity Blog, Sols [...]
3 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) Top Row (from left to right): Michael Stenger, Joe Dervay, Steve Piper, Dave Francisco, Craig Kutz, Matthew Makowski, Alex Garbino, Hiroki Bochimoto, Doug Ebert, James Locke, Raffi Kuyumjian. Bottom Row (from left to right): Mark Crowther, Stephan Moll, Doug Ebersole, Mike Gernhardt, David Southerland, [...]
6 min read NASA-Funded Research Finds Complex Life Defying Record Heat This video shows Incendiamoeba cascadensis motility at 60ºC. When pushed to its limits in the lab, I. cascadensis can remain partially active at 150.8 degrees Fahrenheit (66 degrees Celsius) and can recover from exposure to a staggering 158 degrees Fahrenheit (70 degrees Celsius) [...]
X-ray: NASA/CXC/Univ. of Alabama/M. Muhibullah et al.; Optical: NASA/ESA/STScI; Image Processing: NASA/CXC/SAO/N. Wolk Using NASA’s Chandra X-ray Observatory, researchers found mysterious objects that give off unusually low-energy X-rays but intense levels of ultraviolet radiation. One of the galaxies they studied, M101, is pictured here in this image released on Sept. 9, 2026. Astronomers suggest these [...]
2 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) NASA astronaut Anil Menon reviews procedures for emergency scenarios while aboard the International Space Station as part of his long-duration science and research mission.Credit: NASA Editor’s Note: This feature was updated Sept. 22, 2026, to note the time change for the in-flight call with [...]
APOD Science APOD APOD: 2026 September 22 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Chance Triple [...]
U.S. Deputy Assistant Secretary of State for Space and Environment Connor Tomlinson, left, NASA Deputy Administrator Matt Anderson, Albania’s Minister for Europe and Foreign Affairs Ferit Hoxha, and Ambassador of the Republic of Albania to the United States Ervin Bushati, right, are seen at the conclusion of an Artemis Accords signing ceremony Monday, September 21, [...]
