Far from the planets and familiar constellations, an interstellar visitor is pulsing with a rhythm that looks uncannily like a heartbeat. As its brightness rises and falls in a steady cycle, ...

In late 2025, astronomers spotted an interstellar comet making a quick trip through the solar system. 3I/ATLAS was discovered ...

The mysterious interstellar object that's been flying through the solar system may be leaving behind the building blocks of life on our neighboring worlds. Scans of 3I/ATLAS have revealed two key ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

Space agencies around the globe have launched an unprecedented wave of planetary defense exercises, all centered on a mysterious interstellar visitor that refuses to behave like anything scientists ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists studying the interstellar object ‘Oumuamua have proposed that it may be a fragment from a Pluto-like planet beyond our ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

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The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place before our solar system existed.

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London. Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and ...