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The Life Cycle of Stars
Fichas del conjunto (9)
- 11Nebula - a cloud of gas that forms a star.
- 22Protostar - a cloud of gas becomes so compressed that the heat makes it glow. It then forms a protostar.
- 33Main sequence - hydrogen nuclei get close enough to undergo nuclear fusion.
Star can now stay stable for billions of years. - 44a- Massive starsRed supergiants - stars run out of hydrogen. Outward pressure doesn't balance gravitational pull. The stars core collapses, outer layers expand.
- 55a- Massive starsSupernova - at the end of the red supergiant's life they collapse rapidly and then explode. Outer layers of gas are thrown off while the core continues to collapse.
- 66aa- most massive starsBlack holes - gravity pulls the cores of massive stars together to form black holes. Black holes are so dense that light can't even escape them.
- 76ab- massive starsNeutron star - if remains are not dense enough to form black holes, a small, very dense, neutron star is formed.
- 84bRed giants- - stars run out of hydrogen. Outward pressure does balance gravitational pull. The stars core collapses, outer layers expand.
- 95bWhite dwarf- when the core collapses it forms a white dwarf. No more fusion can take place, the star gradually cools over billions of years.
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- the life cycle of stars in a nut shell
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- 12ha2609
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