When most people think of our Solar System, they think of the 8 planets officially recognized by the International Astronomical Union (IAU). But what if I told you there are at least 40 planets, and ...

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar system by more than 3 billion years, researchers say.

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen – possibly predating our solar system by more than three billion years, researchers say. The "water ...

Breaking news, videos and photos on space and astronomy, including NASA, SpaceX, black holes, the moon, Mars, Jupiter, Saturn, the International Space Station, the ...

The best astrophotography cameras need excellent low-light capabilities to let in as much distant starlight as possible — we've tried and tested the top models.

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