And it could teach us about the early solar system.
They both orbit the sun, but they're very different.
Shower your friends with meteor facts.
You can browse more than 100,000 images from space. Here are our favorite shots.
An 'Oumuamua by any other name would still be as fascinating.
But we won't know until we get there.
The latest from Rosetta's smashing mission
The spacecraft has orbited a duck-shaped comet since 2014, but now its mission is drawing to a close
Making an impact
Sometimes you just need a rocket that flies at 2 million miles per hour
Frozen drinks anyone?
Habitable? That's downright hospitable
Two heads are better than one
No crowdfunding required
What to expect as the Rosetta mission follows Comet 67P to its closest encounter with the Sun
Landin' ain't easy
It may use the time to try some risky maneuvers
Even with a missing lander, the mission is sending back primo info
Different kinds of rocks have different kinds of water
What it might mean for finding life beyond Earth
The lander's harpoon anchors didn't deploy, but it looks like Philae will bounce back ... literally
The Rosetta mission is about to land where no spacecraft has ever landed before.
Beta Pictoris is the ultimate family man ... er, star
Now comes the hard part: actually landing.