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The Most Promising Exoplanets for Extraterrestrial Life

Proxima Centauri b is just 4.24 light-years away. TRAPPIST-1e has seven Earth-sized neighbors. Kepler-452b orbits a Sun-like star. Gliese 66...

Ocean Worlds: Moons That Could Harbor Life

Europa has twice the water of all Earths oceans beneath its ice. Enceladus shoots water geysers into space. Ganymede has a saltwater ocean s...

The Day Pluto Stopped Being a Planet

In 2006 the International Astronomical Union voted to reclassify Pluto as a dwarf planet. The decision was driven by the discovery of Eris, ...

The Most Extreme Weather in the Solar System

Venus has sulfuric acid rain that evaporates before hitting the ground. Jupiter has storms larger than Earth lasting centuries. Neptunes win...

Space Missions That Will Transform Our Understanding

Europa Clipper will search for life in Jupiters ocean moon. JWST is already rewriting exoplanet science. Dragonfly will fly on Titan. OSIRIS...