When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that ...

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 ...

The often controversial Harvard astronomer Avi Loeb, fresh from speculating whether interstellar comet 3I/ATLAS could be an alien spacecraft, is back pointing at another unusual comet and asking ...