Asteroid - Wikipedia
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 …
Eyes on Asteroids - Home - NASA/JPL
1 day 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 | Definition, Size, & Facts | Britannica
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 called the …
NASA tracking bus-sized asteroid approaching Earth this week
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). …
Inside NASA’s Mission to Defend Earth From Deadly Asteroids
2 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 …
An asteroid could hit the moon in 2032, scattering debris toward Earth
7 hours 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.
Asteroid belt — What it is, where it is and how it formed
5 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.
Analyze This: What are the chances of an asteroid hitting Earth?
2 days ago · The odds of a big space rock striking the planet are higher than you might think. But don’t worry — asteroid strikes may be preventable.
What is an asteroid? A beginner's guide to the spacerocks and where ...
Feb 19, 2025 · What are asteroids, where do they come from and how can you see an asteroid in the night sky? A guide to these fascinating space rocks.
NASA’s Hubble Sees Asteroids Colliding at Nearby Star for First Time
1 day ago · NASA’s Hubble Space Telescope has directly imaged similar catastrophic collisions in a nearby planetary system around another star, Fomalhaut.