Solar System
Why Europa?
Forget Mars, the place we really want to go looking for life is Jupiter's moon Europa. Dr. Mike Brown, a…
Where is Earth Located?
You've probably heard the saying “everything’s relative”. When you consider our place in the Universe, everything really is relative. I’m…
Where Did Earth’s Water Come From?
Anyone who's ever seen a map or a globe easily knows that the surface of our planet is mostly covered…
Astronomy Cast Ep. 333: When Worlds Collide
Just take a look at the surface of the Moon and you can see it experienced a savage beating in…
Why Is the Solar System Flat?
It's no mystery that the planets, moons, asteroids, etc. in the Solar System are arranged in a more-or-less flat, plate-like…
Wake Up, Rosetta!
It's being called "the most important alarm clock in the Solar System" -- this Monday, January 20, at 10:00 GMT…
A Distant View of Janus, One of Saturn’s ‘Dancing Moons’
One of 62 moons discovered thus far orbiting giant Saturn, Janus is a 111-mile (179-km) -wide pockmarked potato composed of…
Is the Solar System Really a Vortex?
The short answer? No. Not in the way that a popular animated gif insinuates, at least. If you're even a…
Can Stars Collide?
Imagine a really bad day. Perhaps you’re imagining a day where the Sun crashes into another star, destroying most of…
Hubble Discovers Water Plumes Erupting from Europa
It's been known since 2005 that Saturn's 300-mile-wide moon Enceladus has geysers spewing ice and dust out into orbit from…