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 …
NASA confirms a bus-sized asteroid passed Earth on 22 ...
12 hours ago · Science News: NASA confirmed that a bus-sized asteroid passed Earth on 22 December 2025 in a routine flyby that had been tracked well in advance and posed no risk t.
Eyes on Asteroids - Home - NASA/JPL
3 days 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 …
An asteroid could hit the moon in 2032, scattering debris ...
4 days 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 | Definition, Size, & Facts | Britannica
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 …
Inside NASA’s Mission to Defend Earth From Deadly Asteroids
6 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 …
Asteroid belt — What it is, where it is and how it formed
Dec 15, 2025 · A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth itself — were made.