Pandora, a University of Arizona satellite, is locked and loaded for launch into space, which is just hours away.

A Congressional bill restores funding for most NASA space science missions, but there is no money for returning samples ...

New calculations reported by Live Science indicate Jupiter was once much larger and is still contracting as it cools, offering constraints on early solar system conditions.

Explore seven factual aspects of Jupiter, including its size, moons, rotation, atmosphere, rings, formation, and magnetic field based on NASA findings.

Pluto's days, though they drag on a bit at around 153 hours, are nothing compared to its years. Pluto's orbit takes 248 Earth ...

What was originally thought to be a planet orbiting the Fomalhaut star was probably just the fallout of a wild collision.

If scientists are able to inspect it in person, and they find that Mars was indeed once alive with microbes, we would know ...

We’ve sent spacecraft to every planet in the solar system, but each world presents a different kind of danger. Mercury ...

The solar system’s largest planet shines bright as the Moon wanes and Saturn’s moons dance in the sky this week.

Shining in the constellation Gemini near the bright stars Pollux and Castor, Jupiter's opposition is the best time to see the ...

This Saturday, Jupiter will shine at its biggest and brightest of the year as Earth passes between the largest planet in our ...

Mars, often depicted as a barren red planet, is far from lifeless. With its thin atmosphere and dusty surface, it is an ...