What evidence do we have that galaxies have extended haloes of dark matter?
A) Orbital speed doesn't fall off in the outer parts of galaxies
B) The outer parts of galaxies are intense infrared sources
C) Light from background galaxies is blocked by the dark matter
D) The orbits of distant globular clusters are distorted by the dark matter
Correct Answer:
Verified
Q1: The masses of galaxies are often determined
Q2: The Milky Way galaxy is
A)Irregular
B)Elliptical
C)Spiral
D)Barred spiral
Q4: The most massive galaxies in the universe
Q5: Suppose stars at 1000 ly from the
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
Q9: Suppose a galaxy has a flat rotation
Q10: One would expect the Hertzsprung-Russell diagram of
Q11: A barred spiral with loosely wound arms
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