Meteors

The asteroid that exploded over Luzon was not a threat—but it was a victory for our planetary defense systems.

The astrophysicist's search for an interstellar object led him to the bottom of the ocean floor.

Dark-sky parks, stargazing cruises, and other ways to tour the heavens without leaving our home planet.

Earth's largest documented impact event happened in a remote corner of Siberia in 1908.

Here's what you need to know about witnessing the annual August event, when Earth passes through a comet's castoffs.

From seeing the northern lights aboard a Navy ship in Norway to braving the cold for a glimpse of a blood moon.