A study published in April describes the most accurate measurement yet made of the center of the Solar System.

Astronomy Solar System The Sun The sun just erupted with a major X-class solar flare. Here's what it looked like on video.

A recently detected sunspot region unleashed a powerful X4.5 solar flare early Monday morning, causing radio blackouts throughout parts of the Eastern Hemisphere.

These strange objects could explain how water arrived on Earth, but may also be a previously unrecognised threat to our ...

X-class flares can be 10 times the size of Earth, according to NASA. "The biggest X-class flares are by far the largest explosions in the solar system and are awesome to watch," NASA says.

When most of us left school there were still 9 planets – but we’ve come a long way since Pluto’s demotion. Here’s what’s next on the space agenda.