NASA has unveiled early details of its Artemis III mission, which in 2027 could send astronauts to Earth orbit to set the ...

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

This goes against the previous theory, which has long suggested that Nereid is actually an object captured from the Kuiper ...

Neptune’s moons have long provided evidence of a cataclysm four billion years ago. A new study suggests one moon may have ...

Tonight marks the First Quarter Moon, when roughly half of the Moon’s visible face is illuminated. As of Saturday, May 23, ...

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

E very now and then on Reddit, somebody asks a fun question that demands an answer. This week it is the turn of user ...

The new rocket features a host of upgrades intended to improve safety and performance of the world's most powerful rocket.

Stupid question, but …” is a weekly column answering the not-so-stupid questions that, at this point, we’re all too afraid to ...

The route is not built for speed. During Artemis 2, the Orion spacecraft followed a roughly 10-day free-return path, flying ...

Long before the full moon rises, shifting sunlight transforms the lunar surface into one of the sky's best telescope targets.

Astronomers believe Triton may not have originally formed around Neptune.