New Hubble Space Telescope imagery of the Saturn show it's 'ring spokes' in orbit around the gas giant planet. Credit: ...

The universe has quasi-moons, mini-moon, and moonlets, but no official definition of what counts as a moon.

Over the past seven decades, thousands of sophisticated spacecraft have been launched on ambitious missions to look down on ...

Astronomers have found signs that the small icy world Chiron, orbiting between Saturn and Uranus, may be forming a new ring ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

Our solar system now, once again, officially consists of only eight planets. Although largely debunked, speculation continued ...

New laboratory research suggests that some organic molecules previously detected in plumes erupting from Saturn’s moon ...

As mankind was planning the first moon landing in the 1960s, an asteroid approached Earth—and still hasn’t left.

McKinley Museum planetarium director Suzie Dills says her trip to the Galileo museum in Italy was educational, and a thrill.

The first picture of a planet outside our solar system may actually depict a swirl of space dust, a new study suggests.

Saturn and Jupiter dominate November’s night sky, with a supermoon on the 5th and winter constellations making their return.

The exoplanet, dubbed GJ 251 c, is at least four times larger than our own planet and is likely to be a rocky world located ...