For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

This explorer spacecraft is heading to a rare asteroid with a naked metal core. It could hold clues to how Earth began ...

For the first time ever, the James Webb Space Telescope (JWST) has captured an unprecedented image of an exoplanet outside ...

Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.

How planets revolve does not facilitate as taught in school classrooms; it focuses on a point that is constantly moving.

New images from ESA's Biomass satellite reveal forests, volcanoes, deserts and glaciers in striking detail, hinting at what's still to come.

The relative intensity of Jupiter's radiation bands is illustrated in this diagram, along with the orbits of Jupiter's three other largest moons: Io, Ganymede, and Callisto. To limit the damaging ...