Dear EarthTalk: It seems to me the single biggest potential “environmental” problem we could face—even bigger than global warming or a nuclear war—is a comet or asteroid striking the Earth. Do we ...

If C/2026 A1 (MAPS) survives its close encounter with the sun, it could blaze brightly enough to be seen from Earth.

Choose your fighter for the origin of water on Earth! Was it always here or did it come to this planet from somewhere else in space? And, either way, what does this mean for other water worlds in our ...

The fate of the world could rest on ATLAS’ shoulders. Contrary to allegations that 31/ATLAS is potentially hostile alien tech, the Manhattan-sized comet could provide potentially Earth-saving intel.

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that won’t return until the next millennium. Comet C/2025 A6 (Lemmon), captured ...

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 ...

The rare arrival of interstellar comet 3I/ATLAS is giving scientists a unique chance to strengthen global defences against potential asteroid impacts. The first reason 3I/ATLAS matters is that it ...

Choose your fighter for the origin of water on Earth! Was it always here or did it come to this planet from somewhere else in space? And, either... Comets, asteroids, and planets: The likely origins ...