Life Cycle of Stars 4-3

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Life Cycle of Stars4-3

• The Life cycle of a star depends upon the size
  (Mass) of the star.
• Our Sun is an Average size Star.

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Stages of a Stars Life

• Nebula Cloud of Gas and Dust
• Gravity pulls together

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Protostar

• Birth of a Star( The Beginning) Protostar
• Fusion begins
• Gravity causes hydrogen fusion

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Main Sequence

• A Star is born
• Fusion of hydrogen in the core of the star.
• Gravity Fusion A stable star

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Giant or Super Giant

• Fusion Greater than Gravity
• Average Star Giant Massive Super Giant
• (Super-Nova for the largest Stars)

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Dwarf, Neutron or Blackhole

• Fusion ends Gravity takes over
• Average Stars White Dwarfs
• Largest Stars
• Neutron stars
• Black Holes

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Star Types
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Star Classes

• Big, Bright, Hot
• O B A F G K M
  Small, Dim, Cool