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symbo symbo
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7 years ago
A planetary nebula is
A)   a contracting spherical cloud of gas surrounding a newly formed star in which planets are forming.
B)   an expanding gas shell surrounding a hot, burned-out stellar core.
C)   a disk-shaped nebula of dust and gas, photographed around a relatively young star, from which planets will eventually form.
D)   the nebula caused by the supernova explosion of a massive star.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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discovererdiscoverer
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7 years ago
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symbo Author
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