| http://www.w3.org/ns/prov#value | - The star is a member of a binary star system. ??? ??? ??? Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts? spectroscopic binary ??? ??? ??? The axes on a Hertzsprung-Russell (H-R) diagram represent ______. luminosity and surface temperature ??? ??? ??? What can we infer, at least roughly, from a
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