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 …

2 days ago · NASA is monitoring a house-sized asteroid that is speeding towards Earth at more than 26,200 miles per hour, according to the space agency’s Center for Near Earth Object Studies …

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 …

5 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.

1 day ago · There's a bright side to every situation. In 2032, the Moon itself might have a particularly bright side if it is blasted by a 60-meter-wide asteroid. The chances of such an event are still …

15 hours ago · Asteroid 2024 YR4: Astronomers Are Preparing For The "Most Energetic Lunar Impact Witnessed In Human History" If the impact occurs, it will hit with the force of 6.5 megatons of TNT …

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...

17 hours ago · Scientists warn that a possible asteroid strike on the Moon in 2032 could send debris towards Earth and endanger satellites.