AST201H1 Lecture Notes - Observable Universe, Virgo Supercluster, Local Group
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AST201H1 Full Course Notes
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2)milky way galaxy: a disk shaped area where a bunch of stars stay together and earth, and planets. (one of the largest out of the 40) 3)solar system: consists of all objects that orbit it like the sun, the planet earth, the comets, everything basically. A star is a glowing ball that generates heat in the nuclei, through nuclear fusion. The star lives as long as it can generate energy from the fusion. : star"s death: when a star dies, it basically blows away all its materials into space. Stars die in massive explosions called the supernovae: after the explosion: when the star explodes, its materials are everywhere, and they are combined with the clouds that eventually turn into future stars. Thus this is a star"s recycling life cycle. When one star dies another is born from the same star"s materials: planet : 1. orbits a sun, 2.