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 …

2 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.

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 …

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 …

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.

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

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

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...

4 days ago · Evidence of ‘Lightning-Fast’ Evolution Found After Dino-Killing Asteroid Impact January 21, 2026 An artist’s interpretation of life and death after the asteroid impact that wiped out the dinosaurs. …

May 5, 2025 · Asteroids, sometimes called minor planets, are rocky remnants left over from the formation of our solar system about 4.6 billion years ago. For the most up to date count of asteroids …