Earth Sciences 1086F/G Lecture Notes - Lecture 18: Scattered Disc, Oort Cloud, Comet Nucleus

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Yes, basic carbon component, amino acids: however life as we know it requires temp where water can exist in liquid form. Nucleus: solid, central part of comet repository dust and frozen gas. Low density suggest comet nuclei are not solid objects. Tail: comets close to sun sprout 2 tails. Dust tail: small dust particles that sputter off nucleus, see cause reflect light. Ion tail: blue, glowing gas cause electron/ion get together to form uncharged molecules-process releases light energy: pushed straight away from sun by solar wind, while dust tail trace comets curved orbit. Meteor shower: earth pass through stream of dust. Orbits those that survive close encounter with sun, continue journey to edge of ss. Long-period comets: takes hundreds of years to complete single orbit. Lives of active comets are limited: nuclei losing mass at rates that can"t be sustained for long, active comets are under gravitational control of planets.

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