NASA astronaut and Expedition 72 Flight Engineer Nichole Ayers is pictured during a spacewalk to upgrade the orbital outpost’s power generation system and relocate a communications antenna. Credit: NASA NASA
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Snow in the Shadow of the Andes
Earth Observatory Science Earth Observatory Snow in the Shadow of the Andes Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life
Webb's Picture of the Month Features Two Planet-Forming Disks and a Possible Planet
Two images of protoplanetary disks side-by-side. The left image shows a dark horizontal band covering the star, with broad, colorful, conical outflows above and below it, and a narrow jet
A Mercury Rover Could Explore the Planet by Sticking to the Terminator
A Mercury lander mission would create opportunities to sample unique geological features. However, extreme temperature fluctuations on Mercury’s surface pose challenges for exploration on the planetary surface. In a narrow
Improved thresholds and SSA accuracy can reduce most satellite collision risk
WASHINGTON — Improving the accuracy of space situational awareness (SSA) data and using tighter thresholds for potential conjunctions can help retire most of the risk of satellite collisions in low
A New Class of Star: Merger Remnant
In the vastness of the Universe, any new object with interesting properties can spur the search for similar objects, potentially establishing a new class of stars. In a paper published
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(B) Diagnosis of cloud structure (color), geopotential anomalies (solid lines representing positive values and dotted lines representing negative values), and horizontal velocity fields (red arrows). (C) Top-of-atmosphere thermal flux corresponding
X-ray: NASA/CXC/SAO; Infrared: NASA/ESA/CSA/STScI/Webb; Image Processing: NASA/CXC/SAO/L. Frattare Mid-infrared data from NASA’s James Webb Space Telescope (in white, gray, and red) and X-ray data from NASA’s Chandra X-ray Observatory (in
Graphical Abstract — ACS via Pubmed Electron transfer coupled to redox chemistry is at the heart of metabolism. The proteins responsible for moving electrons (protein electron carriers) must have emerged
NEW ORLEANS — A proposal by the Trump administration to dismantle a leading atmospheric science center would also have implications for space science. The White House announced Dec. 16 it
3 Min Read I Am Artemis: Jen Madsen and Trey Perryman Artemis II Orion Mission Evaluation Room Leads Jen Madsen and Trey Perryman stand in the Orion Mission Evaluation Room
Astronomers have employed the Very Energetic Radiation Imaging Telescope Array System (VERITAS) to observe a mysterious gamma-ray emitting source designated HESS J1857+026. Results of the observational campaign, published December 19
The moon and sun share top billing in 2026.
HELSINKI — China reached 90 orbital launches in 2025 with consecutive Long March missions deploying Guowang megaconstellation satellites and the advanced Fengyun-4C weather spacecraft. A Long March 8A lifted off
A joint research team from South Korea has developed a fascinating wheel inspired by origami and Da Vinci bridge principles that could unlock access to the Moon’s most dangerous and
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