The inner boundary of the main region of the Oort Cloud may be as close as 2,000 AU (astronomical units) from our sun, while its outer edge ... system has nine planets. That all changed in the ...

From a solar eclipse to a dolphin-like nebula, these winning shots by astrophotographers from around the world depict the ...

IT is easy to feel like we know nothing about our universe, and unexplained stellar objects are the most puzzling feature of ...

NASA's Voyager 1 spacecraft took a photo of Earth and the moon. It was the first time both the Earth and the moon were ...

In an exclusive interview with NBC’s Lester Holt, which will air on NBC Nightly News on Tuesday, the crew — billionaire ...

Scientists have used data from a long-retired NASA Dawn spacecraft to solve the mystery surrounding the origins of the ...

So far, searches for the hypothetical Planet Nine have yielded no such world. There are many possible reasons for this, one ...

The Earth has pulled in moons of this type before but none have ever stuck around as long as the moon we know.

Stars, planets, comets, the moon, and space travel are used as metaphors for our feelings of love, loneliness, adventurousness, and awe. This anthology includes poets, astronomers, and scientists from ...

Discover one of the most interesting solar systems in gaming with Outer Wilds. Find out what makes this game amazing... and ...

Just ask aeronautical engineer, astronaut, and aquanaut Nicole Stott. She’s spent 104 days in space on the Space Station and ...

NASA's most distant spacecraft had a critical thruster problem far from home. Fixing it required a long-distance call to ...