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Pluto By: Kalynne Pridgen Caitlyn Gillis, Anna Gomez Karina Hernandez Discovery of Pluto • Pluto was discovered on February18, 1930 by Clyde W. Tombaugh. • Discovered at Lowell Observatory in Flagstaff, Arizona. What is Pluto composed of? • Pluto is composed of: • core of hydrated rock • mantle of water ice • atmosphere containing methane ice This is a difference from the other planets because the other planets are composed mainly of gas. Pluto’s facts • Pluto is the second largest known dwarf planet. • Pluto is also the tenth largest dwarf planet orbiting the sun. • From 1930 to 2006 Pluto was considered a planet, but now they really consider it a dwarf star. • Pluto’s average density is about 1.8 and 2.1 grams per cubic centimeter. • Pluto’s temperature varies throughout the year because it is sometimes closer to the sun than other times. • Pluto is found in the kupid belt. More facts on Pluto • Pluto is 3,675 million miles from the sun. • The diameter of Pluto is 1,429 miles. • The length of a year on Pluto is 1,429 earth days. Pluto’s Moons • When it was first discovered it was thought that Pluto had only one moon. • In 2005 they found 2 more moons, giving Pluto a total of 3 moons. This picture is Pluto and one of its moons, Charon. ↓ This is Pluto, its moon Charon, and the two new moons they found. → Bibliography • http://www.astro.rug.nl/~onderwys/ACTUEELONDERZOEK/JAAR2000/pluto/aose.html • http://www.solarviews.com/eng/pluto.htm • http://images.google.com/imgres?imgurl=http://www.somewhereville.com/gnw/tas/pluto.jpg&imgrefurl=htt p://www.somewhereville.com/gnw/tas/other.html&usg=__MZZgzT5b7IfLTFaYVgPma58smk=&h=500&w= 500&sz=28&hl=en&start=15&tbnid=bnena_2XKjwftM:&tbnh=130&tbnw=130&prev=/images%3Fq%3Dplu to%26gbv%3D2%26hl%3Den%26safe%3Dactive • http://science.nasa.gov/headlines/y2005/01nov_moonsofpluto.htm
