A few Dwarf Planets from our Solar System Pluto Year it was discovered: 1930 Moons: Charon, Styx, Nix, Kerberos, and Hydra. Diameter: 2,377 km Orbital Period: 248 Years Pluto one of the 9th furthest (commonly know) main orbiting object in our solar system got his name from the Greek god of the underworld, Pluto. In 2006 Pluto was reclassified from being a planet to a dwarf planet. It’s also know that he is the largest dwarf planet in The Solar System. In 2015 the spacecraft New Horizons orbited Pluto’s orbit and took a series of shots before redirecting its trajectory to even further objects. Sedna Year it was discovered: 1801 Moons: None* Diameter: 946 km Orbital Period: 4.6 Years Sedna is the closest dwarf planet to the sun. The origin of its name came from the Inuit goddess of the sea, Sedna. Furthermore, Sedna is also the only Dwarf planet with no moons in the whole Solar System. For being one of the smallests dwarf planets a day in Sedna takes only 10 hours. Makemake Year it was discovered: 2005 Moons: MK2 Diameter: 1434 km Orbital Period: 309.9 Years Makemake is the second closest dwarf planet to the sun. Makemake’s name come from the Rapa Nui’s (Aboriginal Polynesian inhabitants of Easter Island) mythology goddess the creator of humanity and god of fertility. The main reason for the given name is due to its discovery date being close to Easter. The planet had an atmosphere made up of methane on nitrogen. The planet was also expected to develop a new atmosphere but it was soon discovered that it won’t develop due to the lack of gas. Eris Year it was discovered: 2005 Moons: Dysnomia Diameter: 2326 km Orbital Period: 560.9 years Eris is the most distant dwarf planet from the sun also known as trans-Neptunian object among with Sedna, Pluto and many more. Eris got his name from the Greek goddess of discord. Due to his size, in 2006, it almost came to be the 10th planet in our Solar System, but it failed the criteria set out by the IAU ( International Astronomical Union. The planet is so far from the sun that sometimes his atmosphere freezes due to lack of sunlight.