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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
Which of these is NOT a source of the shock waves that lead to protostars?
A) expanding Herbig-Haro objects
B) violent supernovae explosions
C) radiation from the OB stars in emission nebulae
D) expanding planetary nebula shells
E) collisions between galaxies
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
Read 235 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
This astronomy class is killing me, thanks for chiming in and answering
Minoring in physics
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#3
8 years ago
Slight Smile
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