First detected in 2004, the dwarf planetHaumeaquickly stood out due to its rapid rotation and elongated form. But the 2017 discovery of a ring system around it added a new level of complexity to an ...

The dwarf planet Haumea orbits the sun in the deep, dark reaches of the outer solar system. Astronomers spotted this object in 2004, and it helped usher in the formal definition a "dwarf planet," ...