A very small, hot star, the last stage in the life cycle of a star like the Sun is ________.
A
red giant
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B
white dwarf
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C
supernova
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D
black hole
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Solution
The correct option is A white dwarf White dwarfs are very small in size, comparable to that of earth, but they are quite dense and their mass is quite large, comparable to that of Sun. Their luminosity comes from the stored thermal energy. The nearest known white dwarf is Sirius B, about 8.6 light years away from earth.