Watch the Sept. 21 partial solar eclipse live online with this handy livestream. Coverage begins at 2 p.m. EDT (1800 GMT).

SpaceX is scheduled to launch NASA’s Interstellar Mapping and Acceleration Probe (IMAP) mission at 7:30 a.m. ET on Wednesday, from Launch Complex 39A at Kennedy Space Center.

We all picture the Solar System as a neat cosmic racetrack with planets orbiting the Sun on a flat, organized path. But have you ever wondered what lies above and below that path? In this video, we ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Our solar system has been around for 4.6 billion years. While that sounds like a long time, it's ...