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-orbital with Jupiter …

Dec 24, 2025 · 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 ring called the …

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 can be found orbiting …

3 days ago · Seen the Messiers, Caldwells, and NGCs? There’s another class of objects waiting: asteroids! This guide will get your observing journey started.

Dec 1, 2025 · Discover the rocky objects orbiting our sun with the latest asteroid news, features and articles.

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. Earlier this year, a …

Apr 2, 2025 · NASA's Webb telescope has captured pictures of the asteroid that caused a stir earlier this year when it topped Earth's hit list.

Apr 22, 2025 · The asteroid 99942 Apophis is headed for a close flyby with Earth on April 13, 2029, and space agencies are coordinating efforts to study the object during this the once-in-a-lifetime …

Feb 8, 2025 · Chance of 2032 asteroid strike have increased. Why scientists say not to worry. Astronomers say a newly discovered 196-foot asteroid has a 1-in-43 chance of hitting Earth in 2032, …

Dec 15, 2025 · NASA is monitoring an asteroid that's hurtling towards the Earth at more than 33,000 miles per hour, according to the space agency's Center for Near Earth Object Studies (CNEOS). …