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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
As a star forms, the photosphere first appears:
A) when contraction slows down.
B) when the protostar forms.
C) when nuclear fires ignite.
D) when the planetary nebula is expelled.
E) when the star reaches the main sequence.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
Read 153 times
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
Exactly what I needed Smiling Face with Open Mouth
Minoring in physics
wrote...
#3
8 years ago
Message back if you need anything
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