Astronomers have spotted something unusual in a comet passing through our Solar System. 3I/ATLAS, only the third confirmed interstellar visitor ever s.

What can a piece of debris from another star tell astronomers about planets they may never see directly? The answer has changed dramatically since the first confirmed object from another star crossed ...

A visitor from another star system is creating excitement in the astronomy community. The comet 3I/ATLAS which was first spotted in July 2025 contains chemical clues that scientists can use to ...

Comet 3I/ATLAS, the third known interstellar object ever detected passing through our solar system, carries a chemical signature that does not match what astronomers typically see in comets born ...

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Interstellar Comet 3I/ATLAS is the gift that keeps on giving. A snapshot of the space that lies beyond the solar system, it brings clues to other stars, other worlds and the galaxy we call home. Just ...

The comet formed in a cold and distant part of the early Milky Way up to 12 billion years ago, putting it just under 2 billion years the age of the universe.

A startup called Reflect Orbital wants to send thousands of mirrors up into space to bounce sunlight to the dark side of the planet. NBC News’ Tom Costello speaks to the CEO Ben Nowack on how he plans ...