AST101H1 Lecture : September 20

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AST101H1 Full Course Notes
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AST101H1 Full Course Notes
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3. planets must be massive enough for their own gravity t compress them into spherical shapes. !planets must have cleared their orbits, that is, there can"t be a lot of other stuff orbiting the parent star in orbits very similar to the planet! in pluto"s orbit, there"s a lot of comets. Pluto"s a dwarf planet, not based on size, but clarity of orbit. Ceres, makemake, haumea, (5 dwarf planets) moon: large body which orbits a planet of the terrestrial planets, noly earth has a moon. Beauty/elegance in science. inspiration, people due trying to make things work, it needs to be worthwhile. simple, elegant, beautiful things make more sense nebula pictures much easier to interpret when they"re simple and beautiful.

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