An asteroid is a minor planet —an object larger than a meteoroid that is neither a planet nor an identified comet —that orbits within the inner Solar System or is co-orbital with Jupiter (Trojan …

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 …

3 days ago · Astronomers discover 2025 SC79, the solar system's second-fastest asteroid, hiding in the Sun's glare. Learn why these 'twilight' asteroids are a top priority for planetary defence.

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 …

Oct 22, 2025 · The newly discovered "twilight" asteroid, 2025 SC79, was obscured by the sun's glare until an astronomer pointed the Dark Energy Camera at it, highlighting the potential …

Oct 23, 2025 · A scientist spotted an asteroid hiding in the sun's glare that orbits the sun in just 128 days, making it the second fastest known asteroid in the solar system.

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.

Oct 20, 2025 · Asteroid - Orbit, Composition, Shape: The rotation periods and shapes of asteroids are determined primarily by monitoring their changing brightness on timescales of minutes to …

Jun 23, 2025 · Asteroids can give scientists key insights into the formation of our solar system and the Milky Way. They contain materials that predate the formation of our solar system. Earlier …

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 …