May 26, 2025
The discovery of Eris helped trigger the debate in the scientific community that led to the decision to clarify the definition of a planet.
Source: NASA
Makemake is slightly smaller than Pluto, and is the second-brightest object in the Kuiper Belt, while Pluto is the brightest.
Source: NASA
Haumea was nicknamed Santa by one discovery team. It is oval-shaped, and is one of the fastest rotating large objects in our solar system.
Source: NASA
Pluto was long considered our solar system's ninth planet. It was reclassified as a dwarf planet in 2006 by the International Astronomical Union.
Source: NASA
Dwarf planet Ceres is the largest object in the asteroid belt between Mars and Jupiter, and it's the only dwarf planet in the inner solar system.
Source: NASA
Featured Missions by NASA