Children at the Sylmar Branch Library were captivated by David Lehman, a volunteer NASA/JPL Solar System ambassador who knows ...

The Solar System is a fascinating place, with each planet orbiting the Sun at its own unique distance. But how far apart are ...

CAPE CANAVERAL, Fla. (AP) — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby ...

As it flew by Mars, the spacecraft's onboard camera snapped 22 pictures of the planet's surface, sending them back home to ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

How did Earth, alone among the solar system's rocky planets, become the home for life? How, among all this frigid ...

Could the Solar System Lose a Planet to a Passing Star? ... Mars, too, has a 0.3 percent chance of the fate of getting an extreme sunburn or starlessly wandering the galaxy.

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

“We’ve always known that the first solid parts of planets, or ‘planetesimals’, must form further back in time at earlier ...

This process, called accretion, is how everything in the solar system – planets, moons, ... which is between Mars and Jupiter. Today, of course, ice is found on almost every planet, even on Mercury.

Here's your chance to see four planets at once (if the sky is clear in Colorado). Venus, Saturn, Jupiter and Mars should be visible an hour after sunset on Saturday.