Solar System

Jupiter May Have Bumped Lost Planet Out Of Our Solar System

The planet -- which would have been our solar system's fifth giant -- had a bumpy ride on its way out, scientists say.

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WATCH: NASA Makes Major Martian Atmosphere Discovery

Solar wind stripped the red planet of its atmosphere, scientists say.

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This Physicist Says Dark Matter May Have Killed Off The Dinosaurs

We can't see it or feel it. But as Lisa Randall says, dark matter may explain a lot about our universe--including the dinos' demise.

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There's A Huge 'Hole' In The Sun And This Is What It Looks Like

The coronal hole recently triggered several auroras here on Earth.

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Mars Used To Have Massive Lakes And Streams, NASA Says

"We see that Mars at some point in its past was much more Earth-like."

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Pluto Has Blue Skies And Red Ice On Its Surface, NASA Says

The distant dwarf planet just keeps surprising us.

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Amazing New Charon Photos Reveal Pluto Moon's Violent Past

Craters, sure, but Charon's surface also features mountains, landslides, and a gigantic canyon.

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Why Bill Nye Is So Pumped About The Mars Water Discovery

"If we were to discover evidence of ancient life, or stranger still, something living there now...it would change the way every one of us feels about being alive."

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Watch NASA's 'Mars Mystery Solved' Press Conference

Find out what the space agency has up its sleeve...

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No, The 'Blood Moon' Doesn't Mean Doomsday Is Here

Weather permitting, the moon will look red—but there's nothing supernatural about that.

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