Most of the mass of a galaxy is contained in the
A) massive O and B stars in the galaxy.
B) neutral hydrogen gas H I regions of the galaxy.
C) ionized hydrogen gas H II regions of the galaxy.
D) dark matter halo of the galaxy.
E) disk ofstars in the galaxy.
Correct Answer:
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Q2: Based on the galaxies found in the
Q4: The rotation curve of a galaxy (orbital
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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