If a Disk Galaxy Is Reasonably Close and Edge-On,the Doppler

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?

A) the galaxy's luminosity
B) the galaxy's diameter
C) the galaxy's mass
D) the galaxy's velocity dispersion curve

Correct Answer:

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Access For Free