The rotation curve of a galaxy (orbital speed versus distance) can be used to determine
A) the colors of hot young stars in the galaxy.
B) the elements which make up the galaxy.
C) the direction in the sky of the galaxy.
D) the age of the galaxy.
E) the mass of the galaxy.
Correct Answer:
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Q2: Based on the galaxies found in the
Q3: Most of the mass of a galaxy
Q5: The most luminous galaxies in blue wavelengths
Q6: Galactic cannibalism refers to
A) binary galaxies.
B) the
Q7: An irregular galaxy contains
A) mostly lower-main sequence
Q8: Astronomers now speculate that a galaxy's shape
Q9: A megaparsec is equivalent to
A) 3.26 light-years.
B)
Q10: We should expect galaxies to collide with
Q11: If H equals 50 km/sec/Mpc,then a galaxy
Q13: _ galaxies contain large clouds of gas
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