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teranine teranine
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If a disk galaxy is reasonably close and edge-on, the Doppler shift of the galaxy disk material relative to the centre can be measured at several distances from the galaxy's centre. What does this measurement tell us about the galaxy?



the galaxy's luminosity



the galaxy's diameter



the galaxy's mass



the galaxy's velocity dispersion curve

Textbook 
ASTRO

ASTRO


Edition: 3rd
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someonespecialsomeonespecial
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Helped a lot
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This helped my grade so much Perfect
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