QUICK FACTS
What it is: The interstellar comet 3I/ATLAS, growing a tail
Where it is: The inner solar system, barreling toward Mars
When it was shared: Sept. 4, 2025
Even as a brilliant, naked-eye comet slices through Earth’s sky (cheers, Comet…
Comet 3I/ATLAS’ upcoming encounter with the sun could change it in big ways — Space photo of the week
