3 days ago · NPR's Ailsa Chang speaks to astronomer Sarah Greenstreet about her team's new discovery of the fastest-spinning large asteroid known to man.

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 …

1 day ago · You are looking at a real-time visualization of every known asteroid or comet that is classified as a Near-Earth Object (NEO). With asteroids represented as blue points, and comets as …

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 ring called the …

4 days ago · A team led by University of Washington astronomers has discovered the fastest-ever spinning asteroid with a diameter over half a kilometer.

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

6 days ago · Asteroid 2025 MN45, discovered by the Vera C. Rubin Observatory, is the fastest-spinning asteroid over 500 metres wide ever found.

Jul 28, 2023 · Using NASA definitions, an asteroid is "A relatively small, inactive, rocky body orbiting the sun," while a comet is a "relatively small, at times active, object whose ices can vaporize in...

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 …

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 …