Solar System
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…
Is Everything in the Universe Expanding?
The Universe is expanding. Distant galaxies are moving away from us in all directions. It’s natural to wonder, is everything…
Where Should We Look for Life in the Solar System?
Emily Lakdawalla is the senior editor and planetary evangelist for the Planetary Society. She's also one of the most knowledgeable…
The Day the Earth Smiled: Saturn Shines in this Amazing Image from the Cassini Team
This summer, for the first time ever, the world was informed that its picture was going to be taken from…
Russia’s Second Shot at Phobos May Return Bits of Mars As Well
After the tragic failure of the first Phobos-Grunt mission to even make it out of low-Earth orbit, the Russian space…