Outlined below are the many steps involved in a stars evolution, from its formation in a nebula, to its death as a white dwarf or neutron star.
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NEBULA Anebula is a cloud of gas (hydrogen) and dust in space. Nebulae are the birthplaces of stars. There are different types of nebula:
a) An Emission Nebula (e.g. such as Orion nebula) glows brightly because the gas in it is energised by the stars that have already formed within it.
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•Flight Through Orion Nebula in Visible and Infrared Light: https://m.youtube.com/watch?v=xCFg5udYbAg
b) In a Reflection Nebula, starlight reflects on the grains of dust in a nebula. The nebula surrounding the Pleiades Cluster is typical of a reflection nebula.
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c) Dark Nebula also exist. These are dense clouds of molecular hydrogen which partially or completely absorb the light from stars behind them (e.g. the Horsehead Nebula in Orion.)
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