Why do elliptical galaxies appear yellow or red in color?
A) They contain many nebulae that glow red in color.
B) Their population is dominated by old, low-mass stars and old, red giant stars.
C) They are moving away from us so their light is highly redshifted.
D) They contain vast amounts of dust that absorbs blue light.
B) Their population is dominated by old, low-mass stars and old, red giant stars.
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