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 …

Oct 20, 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 …

4 days ago · NASA is monitoring a bus-sized asteroid that’s soaring towards Earth at nearly 8,000 miles per hour, according to the space agency's Center for Near Earth Object Studies …

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 …

5 days ago · The chances of a devastating asteroid impact briefly spiked in 2025, after astronomers discovered a building-sized asteroid hurtling towards Earth. The asteroid, named …

Oct 5, 2024 · An asteroid is a small, rocky object that orbits the Sun, primarily found in the asteroid belt between Mars and Jupiter. Asteroids range in size from tiny pebbles to massive …

Dec 3, 2025 · Samples collected from the asteroid Bennu are continuing the shed light on the origins of the solar system and how life developed on Earth, scientists say.

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 …

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 …

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