NBC News' Gadi Schwartz reports on "3I/ATLAS," a mysterious outer space object that is thought to be billions of years old, ...

Researchers are keeping an eye on the building-sized asteroid 2024 YR4, which has a 4 percent chance of hitting the moon seven years from now.

Everyone's favorite interstellar comet, 3I/ATLAS, flew past Earth overnight, coming within about 168 million miles (270 million kilometers) of our planet.

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as ...

Depending on how you look at it, this catchphrase from a 1980s pop song is decently accurate: you can actually melt the ...

For those of you planning on catching a glimpse of the exocomet, besides the weather, the luminosity of 3I/ATLAS is a bummer.

Comet 3I/ATLAS represents just the third object in history to be known to have entered our solar system from outside.

Most dangerous asteroids don’t come with warning signs, and some are almost impossible to spot until it’s too late.

The space object, which was only recently discovered by scientists, will pass closest to Earth on Friday, December 19. Here's ...

David Rankin of the Catalina Sky Survey in Arizona spends nights scanning the solar system for potentially catastrophic space ...