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doit_the_clown doit_the_clown
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7 years ago
In a star's evolutionary life, the asymptotic giant branch (AGB) is the
A)   helium core fusion phase.
B)   pre–main-sequence core hydrogen fusion phase.
C)   hydrogen shell fusion phase prior to helium ignition in the core.
D)   helium shell fusion phase.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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discovererdiscoverer
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