1. Dwarf Planets To Be A Planet, Or Not To Be?

2. Physical Characteristics 5 - Recognized Dwarf Planets –Ceres, Pluto, Haumea, Makemake, Eris Classification Criteria –Directly orbits the Sun (not a satellite) –Relatively round in shape –Has not cleared its orbital path Term applied to Solar System objects in 2006 Ceres

3. Dwarf Planet Orbits Ceres : 2.77 AU Orbital Period = 4.60 years Pluto : 39.48 AU Orbital Period = 248.09 years Haumea : 43.13 AU Orbital Period = 283.28 years Makemake : 45.79 AU Orbital Period = 309.9 years Eris : 67.67 AU Orbital Period = 557 years 1 AU = Distance to Earth from the Sun Pluto

4. Surface and Atmosphere Ceres Diameter : 590 miles Temperature Range : -106 ˚C to -34 ˚C Pluto Diameter : 1,430 miles Average Temperature : - 229 ˚C Haumea Diameter : 1,218 x 943 miles Average Temperature : - 223 ˚C Makemake Diameter : 882 miles Average Temperature : – 239 ˚C Eris Diameter : 1,445 miles Average Temperature : -231 ˚C Haumea

5. Dwarf Planet Discovery Ceres Giuseppe Piazzi (January 1, 1801) Pluto Clyde Tombaugh (February 18, 1930) Haumea Mike Brown et al (December 28, 2004) Makemake Mike Brown, Chad Trujilo, David Rabinowitz (March 31, 2005) Eris Mike Brown, Chad Trujilo, David Rabinowitz (January 5, 2005) Makemake

6. Dwarf Planet Facts 394 possible dwarf planets in the Solar System All dwarf planets located in Kuiper Belt Except Ceres (Asteroid Belt) No dwarf planet has been visited by a space probe 2015 : Dawn (Ceres) & New Horizons (Pluto) Number of known natural satellites (moons) Ceres : 0 Pluto : 5 (Charon, Nix, Hydra, Kerberos, Styx) Haumea : 2 (Hi’iaka, Namaka) Makemake : 0 Eris : 1 (Dysnomia) Eris

7. Dwarf Planets Video https://www.youtube.com/watch?v=CmwclZQ LOaw

8. Literature Cited http://en,wikipedia.org/wiki/dwarfplanets http://www.solarviews.com/eng/dwarfplanets. htmhttp://www.solarviews.com/eng/dwarfplanets. htm http://nineplanets.org/dwarfplanets.htm Our Universe All About Dwarf Planets