Original: Initially known as and later given the minor planet number 136472, it was discovered on March 31, 2005, by a team led by Michael Brown, and announced on July 29, 2005.
Simplified: Makemake (officially known as 136472 Makemake) is a dwarf planet, discovered on March 31, 2005 by astronomers Michael E. Brown, Chad Trujillo and David Rabinowitz.