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~ Pluto. Aug 25, 2006. www.windows2universe.org/pluto/pluto.html
~ Scott, Elaine. When is a planet not a planet? : the story of Pluto New York, NY: Clarion Books, 2007.
~ Astronomy (Teacher Edition) Course J (Holt Science And Technology, Astronomy, Course J), 2005.
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Diameter: 2390 km
Density: 1,750 kg/m
Distance from the sun: 3,666,000,000 Miles
Rotation: 6.387 Earth days
Revolution: 248 Earth Years
Moons: 5 moons; Charon, Hydra, Nix, P4, and P5
1. How many moons does Pluto have?
2. What are the names of Pluto's moons?
3. How many miles is Pluto from the Sun?
4. What year was Pluto discovered?
5. What year was Pluto stripped of its title as planet?
* If you get all of these right, you will get a prize (the knowledge I shared with you).
Pluto is not a planet because the IAU (International Astronomical Union) says it is too small (2390 km diameter).
Pluto should be a planet because Mercury only has a 4878 km diameter and it is a planet. Also, Pluto fits the definition of a planet,which is:
" A celestial body which:
1. is in orbit around the Sun
2. has sufficient mass to assume a nearly round shape,
3. has "cleared the neighborhood" around its orbit."
Pluto fits all of these, and should be named as a planet again.
Surface features: frozen methane, nitrogen,
and carbon monoxide
Materials: methane ice, frozen nitrogen, frozen carbon monoxide
Most of Pluto's physical features (such as mountains and some craters) are unknown. Further missions to Pluto will define its true features.
Discovery: An astromomer named Percival Lowell hoped to find a ninth planet in the solar system. Years later, Clyde Tombaugh discovered Pluto on February 18, 1930. It was originally a planet, but was stripped of its title in 2006.
Probes: The new Horizons Probe has been sent out to get more information on Pluto.
Reconnaissance satellites: New Horizons, a satellite gathering information on Pluto.
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Temperature: -387 to -369 F
Unique Conditions: Sublimation (when Pluto gets so close to Sun that ice changes to a gas and it produces wind and clouds)
Wind: from sublimation, but otherwise unknown
Precipitation: unknown
Atmospheric Gases: methane and nitrogen
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