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 …

12 hours ago · Explore the 3D world of Asteroids, Comets and NEOs. Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth.

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 asteroid belt. Hundreds …

1 day ago · Researchers are keeping an eye on the building-sized asteroid 2024 YR4, which has a 4 percent chance of hitting the moon seven years from now.

Dec 11, 2025 · 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 (CNEOS). …

6 days ago · A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth itself — were made.

3 days ago · Inside NASA’s Mission to Defend Earth From Deadly Asteroids Our Solar System contains tens of thousands of potentially dangerous asteroids that could wipe out an entire city, or worse. In …

There are three general types of asteroids: carbonaceous, stony, and metallic. They are called C-type, S-type, and M-type asteroids. The names are based on the type of material believed to make up …

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 …

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 bodies hundreds of …