Suppose a galaxy has a flat rotation curve.How does the amount of mass within 20 kpc compare to the amount of mass within 10 kpc?
A) Twice as great
B) 4 times as great
C) Half as great
D) One-quarter as great
Correct Answer:
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Q6: A primary difference between spiral and elliptical
Q7: The most numerous galaxies are probably
A)Irregulars
B)Spirals.
C)Ellipticals
D)Barred spirals
Q8: Which of the following is the best
Q10: One would expect the Hertzsprung-Russell diagram of
Q11: A barred spiral with loosely wound arms
Q12: Which of the following types would be
Q13: The Magellanic clouds are
A)Ellipticals
B)Spirals
C)Barred spirals
D)Irregulars
Q14: Elliptical galaxies are reddish in color because
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