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

Millions of asteroids, not a planet, exist in the asteroid belt. The asteroid belt's total mass is only a small fraction of the Moon's mass. Meteorite analysis suggests the asteroids didn't originate ...

The International Astronomical Union (IAU) currently recognizes five dwarf planets in our solar system, though there are likely many more. The most famous of the bunch is Pluto, way out beyond the ...

Aliens may have been closer to Earth than first thought. New research from NASA reveals that Ceres, the dwarf planet in the asteroid belt between Mars and Jupiter, harbored the right conditions to ...

Between the orbits of Mars and Jupiter lies a ring-shaped region called the asteroid belt, home to the vast majority of our solar system’s space rocks. The asteroid belt is as old as the solar system ...

Before the asteroid belt, there was a planet. Some called it Maldek. It had oceans, an atmosphere, and possibly life. Then ...

Karl Ludwig Harding discovered the asteroid Juno on September 1, 1804, using a 5-centimeter refracting telescope. Harding's discovery was part of a larger effort by the "Celestial Police" to locate a ...

We've all heard about the asteroid that wiped out the dinosaurs, a colossal rock 10 kilometers wide. However, there are some smaller ones too. These space rocks are called decameter asteroids, which ...

A surprising discovery has been unveiled by astronomers as they have categorized the 40,000th near-Earth asteroid.The recent ...

The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact configuration and later underwent a violent reshuffling that scattered them to ...

CAPE CANAVERAL, Fla. (AP) — NASA’s Lucy spacecraft will swoop past a small asteroid this weekend as it makes its way to an even bigger prize: the unexplored swarms of asteroids out near Jupiter. It ...