James O'Donoghue went viral for the first time in December 2018. He was a planetary scientist for NASA at the time, but the federal government had temporarily shut down due to budget disputes in ...

The Atlas of Space shows one star, eight planets, ten dwarf planets, moons, comets, asteroids, spacecraft and trans-Neptunian ...

If star-hopping aliens ever visited our solar system, Saturn is probably the planet they'd remember. The seven giant rings circling its equator make Saturn the most distinct planet orbiting the sun.

NASA's Juno probe has flown closer to Jupiter and its largest moon, Ganymede, than any other spacecraft in more than two decades — and the images it beamed back of the gas giant and its icy orb are ...