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Geography, 01.08.2019 12:00 tatilynnsoto17
The hα line (sec. 2.6) of a certain star is received on earth at a wavelength of 682 nm. what is the star's radial velocity with respect to earth?
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The hα line (sec. 2.6) of a certain star is received on earth at a wavelength of 682 nm. what is the...
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