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

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

An intriguing proposal suggests a single solution to multiple issues that the astronauts will have to face on the Moon.

Dante’s vision of Hell may echo the physics of a massive asteroid strike, offering a new way to read the Inferno.

Neptune's mysterious, far-flung moon Nereid may be the last of the planet's original companions. Scientists at the California ...

Neptune’s oddball moon Nereid may be the sole remnant of an earlier system, formed near the planet rather than being pulled ...

Photographers captured the razor-thin lunar crescent just a few days after the new moon phase on May 16, as sunlight ...

What began as a last minute call to use leftover fuel has turned into a landmark experiment in understanding the Lunar ...

Nuclear power plants are safer than many suspect. But putting reactors in space is a concept with a checkered history. One ...

Blue sunsets, whirling dust devils, giant volcanoes, tiny moons, and marsquakes—there’s a lot to discover on Mars!

The rare isotope helium-3 is one of Earth’s most precious commodities—so precious, in fact, that it might prove profitable to ...

At Wailea, the 1,500-acre luxury resort community on Maui’s south shore, everyone gets special treatment from sunup to ...