This illustration depicts charged particles from a solar storm stripping away charged particles of Mars' atmosphere, one of the processes of Martian atmosphere loss studied by NASA's MAVEN mission.
Understanding How Martian Auroras Are Made
This illustration depicts charged particles from a solar storm stripping away charged particles of Mars' atmosphere, one of the processes of Martian atmosphere loss studied by NASA's MAVEN mission.
NASA Astronaut Chris Williams Returns to Earth
NASA astronaut Chris Williams is seen outside the Soyuz MS-28 spacecraft after he landed with Expedition 74 Roscosmos cosmonauts Sergey Kud-Sverchkov, and Sergei Mikaev in a remote area near the town of Zhezkazgan, Kazakhstan on Sunday, July 26, 2026. The trio returned to Earth after logging 241 days in space as a members of Expeditions 73 and 74 aboard the International Space Station.
Guinea-Bissau Tidal Waters
Relatively low tidal waters expose sandflats and mudflats in the Bijagós Archipelago of Guinea-Bissau in this image acquired on November 28, 2025, with the OLI (Operational Land Imager) on Landsat 8. These coastal landforms support an array of invertebrates, making the archipelago a popular stopover for migratory shorebirds.