Is 3I/ATLAS a spaceship? Everything you need to know about this fast-moving interstellar object

November 11, 2025 | 6:08pm

3I/ATLAS, a potentially billions-year-old icy celestial comet has been blazing through our solar system, exhibiting some peculiar characteristics, leading some to speculate that it's actually from alien origin. The mysterious Manhattan-sized interstellar object was discovered in July, but where did it come from? And why is one Harvard astronomer skeptical that it's only a big rock in space?