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 ...

The asteroid belt was a vast collection of rocks that was believed to be the remains of a planet that never formed. During the formation of the solar system 4.6 billion years ago, Jupiter's ...

Lying between Mars and Jupiter is a massive ring of rock debris—the asteroid belt. Now thin, it’s fading away gradually. In a new study, planetary scientist Julio A. Fernández of Uruguay’s Universidad ...

Way out there in the asteroid belt is an object that's spinning so fast, scientists are surprised it hasn't flown apart. Reading time 3 minutes Researchers have identified 19 super- and ...