Life Cycle of a Main Sequence Star

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Life Cycle of a Main Sequence Star

• Objective students will record the stages in the
  life cycle of a star

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Nebulae

• Dense cloud of gas and dust
• hydrogen (97) helium (3).
• Mostly found in the spiral arms of galaxies

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Protostar

• Dense regions in the clouds collapse

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Main Sequence Star

• A protostar collapses to the point hot enough for
  hydrogen to fuse to helium
• Our Sun is a Main Sequence Star
• The more massive a main sequence star, the
  brighter and bluer it is

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Red Giant

• A Main Sequence star burns up its hydrogen
• The stars atmosphere expands outward

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Red Super Giant

• The Red Giants core collapses
• The core reaches a high density to start burning
  helium to carbon
• Helium burns up and expands

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Planetary Nebula

• A hot core of carbon embedded in a nebula of gas
• Radiation from the hot core will produce a
  planetary nebula

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White Dwarf

• The carbon core will eventually cool and become a
  white dwarf

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Black Dwarf

• A white dwarf cools and no longer emits light