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Explorations an Introduction to Astronomy Thomas T. Arny | ||||||||
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Chapter
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Chapter 15, Figure 12
Figure
15.12
(A) Gas atoms
in an interstellar cloud between us and a distant star absorb some of the
star's light, adding their own absorption lines to those in the star's spectrum.
(B) Dust in an interstellar cloud scatters the blue light from a distant star,
removing it from the radiation reaching Earth and making the star look redder
than it really is.
