An asteroid is a minor planet —an object larger than a meteoroid (thus 1 meter or larger) that is neither a planet nor an identified comet —that orbits within the inner Solar System or is co …

Apr 25, 2025 · Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system about 4.6 billion years ago. Most asteroids …

Jan 13, 2026 · Asteroid, any of a host of small bodies, about 1,000 km (600 miles) or less in diameter, that orbit the Sun primarily between the orbits of Mars and Jupiter in a nearly flat …

13 hours ago · The dinosaurs were wiped out by an asteroid, but does that mean we risk suffering the same fate - and should you be worried about the possibility? Leah Crane sets the …

Ceres is the largest asteroid in the asteroid belt that lies between Mars and Jupiter. It orbits the sun once every 4.6 years. Ceres is both an asteroid and a dwarf planet, but it’s a unique bit of …

Feb 18, 2026 · Our planet is currently defenseless against “city killer” asteroids, noting “we don’t know where they are,” a leading scientist has warned this week. Astronomer Kelly Fast, …

1 day ago · NASA is monitoring asteroid 2026 CU1, a 140-foot space rock, as it safely passes Earth at 18,000 mph. While not a threat, its close flyby at 764,000 miles offers a valuable …

Jun 23, 2025 · Asteroids can give scientists key insights into the formation of our solar system and the Milky Way. They contain materials that predate the formation of our solar system. …

1 day ago · Asteroid 2026 CU1 will sweep past Earth this week at high speed, close enough to attract attention yet deemed safe, raising fresh questions about how well we watch the skies.

Feb 3, 2026 · Discover the rocky objects orbiting our sun with the latest asteroid news, features and articles.