What if Jupiter was right next to the Sun? Or what if Earth switched places with Mars? Today, we're re-arranging the planets ...

Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also ...

CAPE CANAVERAL, Fla. — The moon and sun share top billing in 2026. Kicking off the year’s cosmic wonders is the moon, drawing ...

For the first time since Pluto was demoted, the idea of a true ninth planet is edging from speculation toward something ...

A colossal Martian volcano defies everything we know about planetary geology. Hidden clues beneath its frozen summit hint at ...

Xi Zhang, a professor of Earth and planetary science at UC Santa Cruz, has discovered that an exoplanet classed as a ...

Hubble reveals the largest planet-forming disk ever seen, Dracula's Chivito, showing a chaotic and uneven environment around ...

The Artemis II mission, which could launch as early as February, is expected to send four astronauts on a trip to the moon, ...