Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. NASA’s Hubble Space Telescope has snapped images of a recently ...

Discovery: On July 2, 2025, astronomers confirmed Comet 3I/ATLAS, marking only the third interstellar object (ISO) ever detected passing through our Solar System, after 1I/ʻOumuamua (2017) and ...

Animation of a steam world’s evolution from formation to very old age (100 million years to 20 billion years). The interior is initially hot, and cools over time. How fast the planet cools is ...

Sub-Neptune exoplanets tend to be much closer to their host star than Earth is to the Sun and are thought to have atmospheres made of steam over layers of an exotic phase of water that behaves like ...

CAPE CANAVERAL, Fla. (AP) - Astronomers may have found the first moon outside our solar system, a gas behemoth the size of Neptune. Plenty of planets exist beyond our solar system, but a moon around ...

A mysterious interstellar comet — just the third such object ever confirmed to have entered our solar system — streaked past Mars last week. A spacecraft in orbit around the red planet had a front-row ...

NASA has finally pulled back the curtain on a collection of extraordinary images showing an interstellar visitor that has captivated astronomers and conspiracy theorists alike since its discovery this ...