When the solar system formed, a disk of gas and dust orbited the young sun. Over the course of millions of years, the dust ...

The second stage of SpaceX's Falcon 9 rocket captured amazing an amazing view of Earth during the launch of the Intelsat 40e ...

Astronomers believe Triton may not have originally formed around Neptune.

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...

Venus and Jupiter remain visible in the evening sky soon after sunset early in July, although Jupiter fairly quickly drops ...

A study suggests that the ice giant's largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, ...

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying ...

KENNEDY SPACE CENTER — NASA's Europa Clipper mission on Monday launched a satellite to investigate Europa, Jupiter’s “mysterious moon” — a world covered in ice that scientists say could have an ocean ...

Neptune’s third-largest moon, Nereid, could be an intact survivor from the planet’s original satellite system, upending ...

A long-term study of humanity's footprint after dark reveals a constantly shifting portrait of human activity visible from ...

Now in Cancer, the Moon is not far from M44, the Beehive Cluster. Check out this lovely open cluster with binoculars or a ...