Dwarf+Planets-+Jessica+Murphy

​diameter of ceres- 950 kilometers pluto- **2360 kilometers** eris-2400 kilometers

mass of ceres- 2.3 x 10 to the 21 power pluto- ** 1.3 × 1022 kilograms ** eris-1.67 x 10 to the 22 power

Distance from sun: eris- 10 billion miles ceres- 415 million km pluto- 6000 million km

period of revolution: eris: 18.84 hours ceres: 1679.8 days pluto: 247.7 years

period of rotation: eris: 557 years ceres: 1679.819 days pluto: 248 Earth years

average temp.: eris: 405 degrees below zero ceres: x pluto: between -396°F to -378° F

atmosphere: eris: frozen to the planet ceres: does not have one pluto: has one, made up of water ice

surface materials: eris: carbon, oxidized meteoritic clay minerals ceres: rock and has an atmosphere pluto: Nitrogen, rock, and ice

moons, how many, names: eris: 1 moon, Dysnomia ceres: zero pluto: 3 moons, charon, nix, and Hydra

rings, how many, made of: eris: zero ceres: zero pluto: zero

defining characteristics: eris: largest dwarf planet ceres: large dark spot pluto: Pluto has a **[|density]** of about two times that of **[|water]**

hills, valleys, craters, storms: eris: does not have hills, valleys, craters, or storms ceres: has craters pluto: storms and craters

planet discovered: eris: January 5, 2005 Mike Brown ceres: January 1, 1801 by astronomer Giuseppe Piazzi pluto: Feburary 18, 1930 Clyde Tombaugh

got its name: eris: Eris is named for the Greek goddess Eris, a personification of strife, chaos, and discord ceres: Roman goddess of the harvest, of growing plants, and motherly love pluto: Roman god of darkness and the underworld

planet visible from earth: eris: x ceres: yes with a telescope pluto: cannot be seen without a [|telescope]

facts: eris: rocky core, an icy mantle ceres: It is the smallest dwarf planet. It is the only dwarf planet in the Asteroid belt. It is too small to see with the naked eye.
 * Eris** The first [|trans‐Neptunian object] found with a diameter larger than that of Pluto; also known as minor planet

pluto: Pluto is the only planet that has not been visited by a spacecraft from Earth. The [|Pluto Express] probe has been delayed.
 * || Pluto was not the farthest planet from the Sun from February 7, 1979 until February 11, 1999 (the order was Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Pluto, and Neptune). ||