Mars looks quiet today, but new research suggests the planet’s surface still carries the rhythm of a vanished companion.

The direction, distance and motion of the comet through the sky during its closest approach could have made it seem like it ...

One of the oldest unsolved riddles in planetary science concerns the origin of the moon. Over a century ago, George Darwin ...

A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth ...

As a superpower Space Race II speeds up, the U.S. needs to launch a national emergency campaign to beat China in landing ...

NASA is hoping to answer questions about alien life by sending humans to Mars in the 2030s for the very first time, but it ...

Former SpaceX propulsion lead Tom Mueller discusses Falcon 9 engine development, SpaceX's iteration culture, and Impulse ...

A sleep-inducing molecule humans use to make proteins was found, along with other amino acids, on an asteroid named Bennu.

The peak shower will appear to the east, coming out of the Gemini constellation, between 8 and 9 p.m. Saturday, and will last through the night. Meteors began falling on Dec. 4 and will continue until ...

The galaxy’s most common stars may be missing a key ingredient for life: Long-lived moons. Most stars in our galaxy are small ...

There are two small moons in orbit around Mars today, but both may be remnants of a much larger moon that had enough of a ...

After nearly 20 years on the Red Planet, NASA's Mars Reconnaissance Orbiter (MRO) has snapped its 100,000th image of the ...