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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
What is the dilemma about the spiral arm structure of a typical spiral galaxy?

(a)   If the measured speeds of stars in the galaxy had spun the arms into shape, these arms would be far more tightly wound than the observed arms.
(b)   If the measured speeds of stars in the galaxy had spun the arms into shape, these arms would be far less tightly wound than the observed arms.
(c)   The measured speeds of material in the spiral arms should NOT have led to any spiral but should have generated a straight bar rotating like a solid object.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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discovererdiscoverer
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staedtler Author
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6 years ago
Grinning Face Exactly what I needed
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