An irregular galaxy contains
A) mostly lower-main sequence stars and giants.
B) mostly upper main sequence stars and giants.
C) mostly upper main sequence stars and gas and dust.
D) upper and lower main sequence stars and gas and dust.
E) mostly white dwarfs and supergiants.
Correct Answer:
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Q2: Based on the galaxies found in the
Q3: Most of the mass of a galaxy
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
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
Q12: If a galaxy has a radial velocity
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