On January 1, 1801, a Sicilian astronomer named Giuseppe Piazzi discovered the dwarf planet Ceres orbiting the sun between Mars and Jupiter. At the time, Ceres was considered to be a planet. But after ...

Ceres is the largest object in the asteroid belt and the closest dwarf planet to Earth. Discovered in 1801 and visited by ...

More than 50 times further from the Sun than Earth, the tiny dwarf planet Makemake is one of the last places you'd expect to find an intact gaseous atmosphere. Not only is it incredibly cold, being ...