AST101H1 Lecture Notes - Lecture 18: Ahuna Mons, Cryovolcano, Minor-Planet Moon

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AST101H1 Full Course Notes
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AST101H1 Full Course Notes
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The dwarf planets: orbit the sun, large enough to be roughly spherical, do(cid:374)"t (cid:272)lear their or(cid:271)it, examples: eris, pluto, makemake, haumea, sedna, 2007 or10, quaoar, orcus, ceres, The asteroid belt: over 1 million asteroids larger than 1km diameter, orbit sun in same direction as planets. Asteroids: orbit sun, not large enough to be spherical, rocky, examples: ida, mathilde, vesta, lutetia. Clicker q&a: the main distinction between an asteroid and dwarf planet is its shape. Clicker q&a: small meteorite found is made mainly from volcanic rock. Where it could it be from: crust or mantle of planet or large asteroid. New horizons: 9. 5-year trip to pluto, travelling at 50000 km/hr. 230 c temp: surface = nitrogen ice, water ice mountains, charo(cid:374) = pluto"s (cid:272)o(cid:373)pa(cid:374)io(cid:374) Comets: many icy bodies but much smaller, what happens when they orbit into inner solar system, comet 67p outgassing in feb. 2015, as it gets closer to the sun.

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