asteroid belt kuiper belt oort cloud. asteroid belt discovered in 1801. piazza found ceres. olbers...
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Asteroid BeltKuiper BeltOort cloud
Asteroid BeltAsteroid Belt
• Discovered in 1801.
• Piazza found Ceres. Olbers found Pallas. Previously predicted by Franz Xaver VonZach.
Asteroid BeltAsteroid Belt
• The region of space between Mars and Jupiter; about 2.8AU
• Hundreds of thousands of asteroids known. Probably millions.
Asteroid BeltAsteroid Belt
• 3 types of asteroid: Carbonaceous, Silicate, Metallic
• Even the largest object in the belt, Ceres, is too dim to see without aid
Asteroid BeltAsteroid Belt
• Remnants of a planet-formation process that failed
Kuiper BeltKuiper Belt
• Discovered in 1992
• Named for Dutch Astronomer Gerard Kuiper, who had PREDICTED its existence in 1951.
Kuiper BeltKuiper Belt
• Region beyond Neptune; 30 to over 50AU
• At least 70 000 small, icy, slow-moving, objects
Kuiper BeltKuiper 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 BeltKuiper Belt
• History of solar system
Oort CloudOort Cloud
• Hypothetical spherical cloud. No direct observations.
• Proposed by Ernst Opik (1932), Jan Henrik Oort (1950)
Oort CloudOort Cloud
• 50 000AU; defines gravitational boundary of solar system
• Source of long-period Comets
Oort CloudOort Cloud
• Objects composed of ices (water, methane, and ammonia)
• 2 regions: outer sphere, inner disc
Oort CloudOort Cloud
• Comets can not have formed on their current orbit
• Must be held in an outer reservoir
Sources• http://www.lpl.arizona.edu/faculty/malhotra_preprints/ISP_Nov04/Ku
iperBelt.jpg• http://www.cnes.fr/automne_modules_files/standard/public/p1135_e
d77069b38b89947b9f6e5678e9af2adkuiper_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