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

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

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

Astronomers are tracking a rare interstellar object traveling at record speeds and passing unusually close to multiple ...

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

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

Plus Jon Willis’s “The Pale Blue Data Point.” ...

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.

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 ...

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

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

New models suggest that Europa has very little tectonic activity at its seafloor, which is potentially catastrophic news for ...