Iceberg A-81 escaping the Weddell Sea and drifting near the edge of South Georgia’s underwater shelf.
The Vera Rubin Observatory has discovered a suspected dwarf planet beyond Neptune’s orbit. If confirmed, it would be the sixth known dwarf planet in our solar system.
Baffling long radio echo delays have prompted a range of potential explanations, most of which focus on a variety of unexplained natural phenomena occurring in Earth’s atmosphere.
A satellite image of “Spider Crater” in Western Australia.
NASA’s OSIRIS-REx asteroid-sampling mission formally ended on Sept. 30, 2026, though scientists will continue to study the pieces of space rock it returned for decades.
One new study shows how much the moon has diminished over time.
The European Space Agency’s Copernicus Sentinel-3 satellite mission captured a close-up of West Antarctica from its perch high above Earth.
Known as the giant-impact hypothesis, this proposed event involves a collision between Earth and a hypothetical Mars-sized protoplanet astronomers call Theia.
Japan will launch its audacious MMX sample-return mission to Mars today (Oct. 19), and you can watch the historic action live.
Two leading space scientists say there is a need to redefine the edge of the solar system based on the Milky Way’s gravity, including its dark matter.