At first, debris shed by an asteroid or comet travels closely together. Imagine squeezing a single drop of food dye into a moving stream of water: Initially, the dye stays in a tight, concentrated ...

Mountain View, CA - Asteroid Day, June 30th - What do astrophysicist Steven Hawking, Queen guitarist Brian May and the country of Luxembourg have in common? They’re all key figures in Asteroid Day - a ...

As the interstellar comet 3I/ATLAS prepares for its closest approach to Earth on Dec. 19, it's being monitored not just by space agencies but also the United Nations. The comet, which will come within ...