Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison with Pluto.

As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth.

NASA's Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer (SPHEREx) was built for ...

In Musk’s telling, the step beyond data centers orbiting Earth is even larger computers in deep space. And furthermore, Musk ...

New research from ETH Zurich challenges the long-held “follow the water” rule in the search for extraterrestrial life.

Mercury has long been cast as the solar system’s burnt-out rock, a relic too small and too close to the Sun to hold many ...

Elon Musk is putting his dreams of colonizing Mars on hold and said his SpaceX rocket company will instead focus on building ...

Elon Musk confirmed that he'd changed the location of his 'Million-person' Space X city, following claims he would found a ...

The most intense type of solar flares emitted by the Sun is the X-class, and several of them in a short period of time is ...

Last year, Musk said "the moon is a distraction." Now, he's talking about building a city there. The shift may be more ...

In 1883, a comet capable of ending life on Earth narrowly missed impact. Only one man on the planet noticed, a Mexican scientist.