A 500-foot- wide space rock could inflict mass casualties across a state or a small country; those arrive every 20,000 years.

Meteors, meteorites, comets, asteroids… there are so many names for the various space rocks ... trails of color streaming through the sky – those are meteors – or else some rock will be ...

New research has indicated that, if Alpha Centauri ejects as much material as the solar system, then as many as one million space rocks larger than 328 feet (100 meters) wide could be lurking in ...

Two weeks ago, they calculated that the space rock, dubbed 2024 YR4, had a 1.3 percent chance of hitting the Earth — and now, that probability has risen substantially. That's the bad news.