white dwarf - star that has depleted its fuel supply and is in the last stage of stellar evolution, nebula - cloud of gas and dust in space., black hole - area in space with an incredibly strong gravity, supernova - super-powerful explosion of a star, red giant - a star that has low surface temperature and a diameter larger than the sun., protostar - young star in the earliest stage of stellar evolution, neutron star - very small and dense star made almost completely of neutrons,

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