Credit: NASA The Republic of Croatia became the 74th signatory to the Artemis Accords on Wednesday during a ceremony in the capital city of Zagreb with NASA and U.S. Department of State officials present. “It is my privilege to welcome the Republic of Croatia as the latest signatory of the Artemis Accords,” said NASA Deputy [...]
Credit: NASA NASA announced Wednesday a mission to explore the history and evolution of the universe, PRIMA (PRobe far-Infrared Mission for Astrophysics), is advancing to the next phase of development. This space telescope is the first in a new class of NASA astrophysics missions, called Probe Explorers, within the agency’s longstanding Explorers Program. “The PRIMA [...]
A photo of the Dynamic Aviation A200 aircraft, which will conduct low-flying research flights over farmland near Greeley, Colorado, to measure emissions in October 2026. Dynamic Aviation Agricultural emissions represent an important and understudied part of Earth’s land and atmosphere systems. The FarmFlux mission will deploy more than a dozen sensors to measure ozone, methane, ammonia, particulates, and other pollutants rising from [...]
An image from NASA’s Hubble Space Telescope of galaxy cluster MACS J0417 is part of repeated observations to monitor for the reappearance of supernova Athena, which can help astronomers measure the expansion rate of the universe.NASA, ESA, STScI, M. Pascale (UCLA); Image Processing: J. DePasquale (STScI) NASA’s Hubble Space Telescope captured this image of massive [...]
Daily images of ice cover in the Arctic Ocean show sea ice melting around the pole from March 15, 2026 to Sept. 12, 2026. Trent Schindler/NASA’s Scientific Visualization Studio Arctic sea ice reached its annual minimum extent on Sept. 12, according to NASA and the National Snow and Ice Data Center (NSIDC) at the [...]
Astronaut Shannon W. Lucid checked on wheat plants aboard Russia’s Mir Space Station on Sept. 23, 1996. Lucid left Mir later that day along with the rest of the STS-79 crew except for John E. Blaha, who was beginning a four-month stay aboard the station.NASA Shannon Lucid’s Record-Setting Mission Aboard Mir Three days before returning [...]
Explore This Section Earth Earth Observer Editor’s Corner Feature Articles Meeting Summaries News Science in the News In Memoriam Announcements Archives FFA 2026 Join NASA in the Exhibit Hall (Booth #648) for Hyperwall Storytelling by NASA experts. Full Hyperwall Agenda below. TUESDAY, OCTOBER 20 10:00 AM NISAR Updates, One Year After Launch Paul Rosen, [...]
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 [...]
