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 …

2 days 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.

Apr 8, 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 …

Apr 15, 2026 · An asteroid the size of three football fields will pass near Earth in three years, giving scientists a rare chance to study a colossal space rock from close range. Named Apophis — after the ...

3 days ago · Asteroid 99942 Apophis will make an exceptionally close approach to Earth on April 13, 2029. It will pass about 32,000 km (20,000 miles) from the planet’s surface, closer than many …

3 days ago · Welcome to Asteroid Alerts, your source for tracking Near-Earth Objects and potential asteroid threats. Our system continuously monitors data from Minor Planet Center and NASA Sentry …

Mar 19, 2026 · Discover the rocky objects orbiting our sun with the latest asteroid news, features and articles.

Discover which asteroids, including Vesta and Pallas, are visible tonight. Check their location, brightness, and best viewing times to observe them in the sky.

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...

2 days ago · Two airplane-size asteroids, 2026 HJ3 and 2026 HR, are set to make a safe close approach to Earth on 27 April 2026, passing millions of miles away with no risk of impact.