A erupted with M1 and M6 class solar flares. Watch the fireworks in these views from NASA's Solar Dynamics Observatory.

The sun is governed by a strict rhythm. The magnetic activity of the sun displays a cyclic variation, reaching a maximum ...

I/ATLAS is the fastest comet ever recorded and its interstellar! NASA's Goddard Space Flight Center explains. Credit: NASA's ...

Astrophotographer Mark Johnstron captured a mesmerizing cloud of hydrogen plasma dancing above the sun's limb in this ...

Researchers using new simulations suggest that the Milky Way’s past collisions may have reshaped its dark matter core. This ...