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The Life and Death of a Star

The Life and Death of a Star. Birth of Low and Medium Mass Stars. Nebula Large cloud of gas and dust. . Protostar When the cloud of gas and dust contract together to form a body which begins to resemble a star. . Main S equence S tar

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The Life and Death of a Star

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  1. The Life and Death of a Star

  2. Birth of Low and Medium Mass Stars • Nebula • Large cloud of gas and dust.

  3. Protostar • When the cloud of gas and dust contract together to form a body which begins to resemble a star.

  4. Main Sequence Star • A star is formed when nuclear fusion begins in its core. • Low Mass stars can burn up to 200 billion years. • Medium Mass stars can burn up to 10 billion years

  5. Death of Low and Medium Mass Stars • Red Giant • Star expands to several times its size and becomes brighter.

  6. Planetary Nebula • Outer layers of the star’s atmosphere begin to drift away. • Only the core of the star is left.

  7. White Dwarf • The remaining hot core of the star.

  8. Black Dwarf • A black corpse of the original star.

  9. Birth of High Mass Stars • Nebula • Large cloud of gas and dust.

  10. Protostar • Larger amounts of dust and gas contract together.

  11. Main sequence high mass star • Much larger and burns fuel quicker. • Average life span is 10-15 million years.

  12. Death of High Mass Stars • Supergiant • Star runs out of fuel and expands. • Much larger and brighter than a red giant.

  13. Supernova • Core of supergiant collapses under its weight. • Core explodes shinning millions of times brighter.

  14. Neutron Star • Small, dense remains of the high mass star after a supernova. • Pulsars-spinning neutron stars which “pulsate” radio waves.

  15. OR • Black hole • An object with gravity so strong that nothing can escape it. • Extremely dense.

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