Astronomy Notes - Astonomy Chapter 6 Vagabonds of the Solar...

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Astonomy Chapter 6 – Vagabonds of the Solar System dwarf planet – in orbit around the Sun and has enough mass to be mostly spherical, but has not cleared its orbit of other bodies - 5 dwarf planets: Hauma, Makemake, Pluto, Eris, Ceres Eris, Makemake and Haumea are also Kuiper belt objects (KBOs) and plutoids. Many definitions for objects in the Solar System overlap. small solar-system body – anything smaller than a dwarf planet Pluto - discovered because it moved from night to night compared to the background stars = large proper motion - orbit is very different from the orbits of the major planets - large eccentricity (e=0.25) o result = sometimes closer to the Sun than Neptune - small and very far from the Sun = very faint - Little was known about Pluto until its largest moon, Charon was discovered in 1978. - Charon is ½ the diameter of Pluto. - Pluto may have captured Charon. - Hubble Telescope image revealed two smaller moons in 2005. - Best info about surface of Pluto comes from HST images. -
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This note was uploaded on 03/21/2011 for the course ASTR 1101 taught by Professor Mcgimsey during the Spring '11 term at Georgia State University, Atlanta.

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Astronomy Notes - Astonomy Chapter 6 Vagabonds of the Solar...

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