On Friday, an object that formed outside of our galaxy passes close enough to Earth that we have a chance to see it in the night sky. It’s taken the astronomy community by storm. What is Comet ...

Sunspots AR3664 and AR3663 have been erupting with X- and M-class solar flares. Both sunspots are Earth-facing and could ...

The spacecraft that now skims through the Sun’s blistering atmosphere is not just surviving, it is turning that hostile ...

A new study finds that, with the immense quantity of satellites that hurtle in Earth's orbit today, the first smashup would ...

Activity on the sun is not constant; it varies along a cycle of about 11 years. The peak of this solar cycle — called solar ...