A theory involving a "mushy zone" of ice along the moon’s fissures could explain the enormous plumes erupting from its south ...

The view was acquired on Sept. 14, 2017 at 19:59 UTC (spacecraft event time). The view was taken in visible light using the ...

Here's everything you need to know about why Saturn's rings are about to disappear — and when they will return.

Why Has No Rocket Surpassed Saturn V? Despite advances in technology, no rocket has matched Saturn V’s power and size. But ...

Saturn's iconic ring system will disappear, albeit temporarily, on March 23—a preview of its fate in 100 million years.

A pair of extraordinary space missions that have been headed out of the solar system for almost half a century are getting a ...

Why Nasa is switching off instruments on its twin Voyager spacecraft - The twin spacecraft, Voyager 1 and 2, launched in 1977 ...

The document builds on the academies' decadal survey, outlining recommended missions for NASA's next New Frontiers program.

After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

The world’s premier space observatory has spotted a mysterious and huge, free-floating planetary-mass object that’s “just 20 ...

Mercury has a rocky surface when, facing the sun, can reach highs of 800 degrees while overnight lows could reach minus 290 ...

Launched in 1977, the Voyager spacecrafts are currently exploring interstellar space. Voyager 1 is now 24.14 billion ...