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Asteroid Belt Kuiper Belt Oort cloud. Asteroid Belt. Discovered in 1801. Piazza found Ceres. Olbers found Pallas. Previously predicted by Franz Xaver VonZach. Asteroid Belt. The region of space between Mars and Jupiter; about 2.8AU

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asteroid belt
Asteroid Belt
  • Discovered in 1801.
  • Piazza found Ceres. Olbers found Pallas. Previously predicted by Franz Xaver VonZach.
asteroid belt1
Asteroid Belt
  • The region of space between Mars and Jupiter; about 2.8AU
  • Hundreds of thousands of asteroids known. Probably millions.
asteroid belt2
Asteroid Belt
  • 3 types of asteroid: Carbonaceous, Silicate, Metallic
  • Even the largest object in the belt, Ceres, is too dim to see without aid
asteroid belt3
Asteroid Belt
  • Remnants of a planet-formation process that failed
kuiper belt
Kuiper Belt
  • Discovered in 1992
  • Named for Dutch Astronomer Gerard Kuiper, who had PREDICTED its existence in 1951.
kuiper belt1
Kuiper Belt
  • Region beyond Neptune; 30 to over 50AU
  • At least 70 000 small, icy, slow-moving, objects
kuiper belt2
Kuiper Belt
  • Very faint objects because small, far and reflect light from Sun
  • A million times fainter than faintest we can see with naked-eye
kuiper belt3
Kuiper Belt
  • History of solar system
oort cloud
Oort Cloud
  • Hypothetical spherical cloud. No direct observations.
  • Proposed by Ernst Opik (1932), Jan Henrik Oort (1950)
oort cloud1
Oort Cloud
  • 50 000AU; defines gravitational boundary of solar system
  • Source of long-period Comets
oort cloud2
Oort Cloud
  • Objects composed of ices (water, methane, and ammonia)
  • 2 regions: outer sphere, inner disc
oort cloud3
Oort Cloud
  • Comets can not have formed on their current orbit
  • Must be held in an outer reservoir
sources
Sources
  • http://www.lpl.arizona.edu/faculty/malhotra_preprints/ISP_Nov04/KuiperBelt.jpg
  • http://www.cnes.fr/automne_modules_files/standard/public/p1135_ed77069b38b89947b9f6e5678e9af2adkuiper_pluton.jpg
  • http://discovermagazine.com/2004/nov/cover/outer-oort.jpg
  • http://www.myastrologybook.com/OortCloud10q8x7.jpg
  • http://en.wikipedia.org/wiki/Oort_cloud
  • http://en.wikipedia.org/wiki/Ceres_(dwarf_planet)
  • http://www.astro.ubc.ca/~lallen/kbo/general.html
  • http://www.enchantedlearning.com/subjects/astronomy/solarsystem/kuiper.shtml
  • Universe: The Definitive Visual Guide