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Watch comet/alien spacecraft 3I/ATLAS make its closest approach to Earth

Gail P Sherman
Dec 18, 2025
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image: Marko Aliaksandr/Shutterstock

3I/ATLAS is definitely a comet, not an alien spacecraft, but it is only the third confirmed interstellar object detected in our solar system, and may be as much as 7 billion years old, so it is still pretty cool and worth checking out. As it makes its closest approach to Earth tonight, the comet will appear to most sm…

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Gail P Sherman
Geek, gamer, childless cat (and dog) lady
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