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Astronomy
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Planetary Nebulae and White Dwarfs
Grade Level
Astronomy
AST.201 Planetary Nebulae and White Dwarfs
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Which observation best suggests that an object is a white dwarf rather than a normal main-sequence star?
A
It is cool, red, and thousands of times larger than the Sun.
B
It produces a long comet tail made of ice and dust.
C
It is very hot and blue-white but has low luminosity because it is extremely small.
D
It has spiral arms and billions of separate stars.
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