Life cycle of stars

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  • Created by: Anya
  • Created on: 08-05-14 21:23

Protostar

  • Force of gravity causes dust and gases to spiral together
  • Gravitational potential energy is converted into heat energy so the temp rises
  • When hot enough hydrogen nuclei undergo fusion to become helium nuclei

Main Sequence Star

  • Heat created by fusion creates an outward pressure against the force of gravity pushing inwards
  • Due to massive amounts of hydrogen the star maintains its stable period for many years

Red giant and supergiant

  • Hydrogen begins to run out
  • Heavier elements such as iron are made by nuclear fusion…

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