Astronomers now speculate that a galaxy's shape depends on all of the following EXCEPT
A) the rate of star formation.
B) the history of past collisions.
C) the mass.
D) its direction in the sky as seen from Earth
E) All of the above are important in determining a galaxy's shape.
Correct Answer:
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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
Q7: An irregular galaxy contains
A) mostly lower-main sequence
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
Q13: The mass of a single galaxy might
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