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 …

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 …

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 …

4 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.

Dec 25, 2025 · Scientists are digging into the hidden makeup of carbon-rich asteroids to see whether they could one day fuel space exploration—or even be mined for valuable resources. By analyzing …

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 …

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 …

Feb 13, 2025 · An asteroid may be heading toward Earth for a 2032 date, but don't worry — it's not looking to crash the party yet. NASA is closely monitoring Asteroid 2024 YR4, which could potentially …

Asteroids are cosmic time capsules. These ancient rocks, left over from the formation of the Solar System, offer a direct link to our distant past. They provide clues to how planets like Earth formed …