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Unformatted text preview: o The particles collapse into a disk because everything gets pulled into the center o Knots within the disk form to become planets o This is a continuous process No official boundaries between planetessimals and protoplanets o Planets are made of different materials because the planets are made of the materials that can condense at the temperature where they are forming i.e. If you are condensing a planet where Mercury, it is hot, so you can only use material that will condense at that high of a temperature Comets o We do not know why an object come in from the Oort cloud or the Kuipers Belt o Dust tail is always yellowish and the Ion tail is always bluish Tails can disconnect Comet tails always point away from the Sun o Comet nucleuses are black Looked upon as a dirty snowball Comet nucleus are a bit oblong (kind of potato shaped) Made up of patches of the four ices...
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