ian morris astronomy 1040. the dwarf planets eris pluto makemake haumea ceres
TRANSCRIPT
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Dwarf Planets
Ian MorrisAstronomy 1040
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What is a Dwarf Planet?
In order to be considered a Dwarf Planet certain criteria must be met.
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What is a Dwarf Planet?
• It is an object in orbit around the Sun.
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What is a Dwarf Planet?
• It has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a
hydrostatic equilibrium (nearly round) shape.
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What is a Dwarf Planet?
• It has not cleared the neighbourhood around its orbit.
• It Is not a satellite of a Planet.
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The Dwarf Planets• Eris• Pluto•Makemake• Haumea • Ceres
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Eris• Discovered
January 5, 2005 by Brown, Trujillo and Rabinowitz.
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Eris• Largest
Dwarf Planet. It is 23% of Earths Moon.• Has one
Moon:• Dysnomia
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Eris• Orbits the
Sun every 560 years.• Orbital
Inclination is 44 degrees.
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Pluto• Discovered
February 18, 1930 by Clyde Tombaugh using Newtonian Mechanics.
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Pluto• 2nd Largest of
the Dwarf Planets• 3 Moons:• Charon• Hydra• Nix
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Pluto
• Mass is about 17% of Earths Moon.• Atmosphere is Methane and Carbon Dioxide.
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Pluto
• Pluto Orbits the sun every 246 years.• Orbital inclination is 17 degrees.
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Pluto
• Pluto Orbits around a point outside its central mass due to the mass of Charon. A Binary Planet.
• Pluto and Charon are tidally locked. The same face is always in the others sky.
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Haumea• Discovered
December 28, 2004 by Mike Brown.• Has 2 moons:• Hiraka• Namaka
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Haumea• The elliptical
shape is believed to be the result of a collision.• Its mass is
about 6% of Earths Moon
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Haumea
• Orbits the Sun every 238 years.• Orbital Inclination is 28 degrees.
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Makemake• Discovered
March 31, 2005 by Brown, Trujillo and Rabinowitz.
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Makemake• Has no known
Moons.• The surface is
thought to be similar to Pluto's as both Methane and Nitrogen are present.
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Makemake
• Orbits the sun every 309 years• Orbital inclination is 29 degrees.
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Ceres• Discovered
January 1 1801 by Giuseppe Piazzi• Lies in the
asteroid belt.• Is the only
Dwarf Planet outside the Kuiper Belt.
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Ceres• Is composed
mostly of rock and water ice.• Up to 200
million cubic kilometers of water ice.• The crust is
100 km thick ice.
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Ceres
• Orbital Period of 4.6 years• Orbital Inclination is about 10 degrees
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Citations
• http://www.iau.org/• http
://web.gps.caltech.edu/~mbrown/2003EL61/• http://science.nationalgeographic.com/scienc
e/space/solar-system/dwarf-planet/