We saw similar things in a previous interstellar comet, 2I/Borisov, and in some solar system comets.” “The idea that 3I/ATLAS could be an alien spacecraft is simply nonsense. There’s nothing about it ...

I do so love an ostentatious comet. As I wrote in a recent “The Universe” column, when these dusty ice balls are billions of kilometers from the sun, they’re frozen solid. But as they near our star on ...

A small, icy visitor from beyond the solar system is giving scientists an unusually close look at the chemistry that may help planets come alive. As the interstellar comet 3I/ATLAS sweeps past the Sun ...