Helioseismic data traces the solar dynamo to the tachocline about 200,000 km down.

Greek mythology has given a name to a great many objects in our solar system. But perhaps one of the least well understood ...

Brown dwarfs get a bad rap in the stellar world, often labeled as "failed stars" for their inability to sustain nuclear ...

Auroras may be visible from Alaska to Illinois tonight as several coronal mass ejections are forecast to impact within the ...

Kepler-51d is a giant, ultra-light “super-puff” planet wrapped in an unusually thick haze that’s blocking scientists from ...

By plying its ground-penetrating radar in the depths of Mars’s Jezero Crater, this rover has found even older deltas buried beneath those seen on the surface from space ...

Aurora chasers, keep your eyes on the skies over the coming days as several incoming coronal mass ejections could spark favorable conditions for widespread northern lights displays.

A fridge-size space rock spectacularly broke apart over Ohio at 40,000 mph, creating a loud boom and a rare "fireball" that shone in the bright blue daytime sky. The rare sight, which exploded with ...