Which of the following statements is true about binary-star systems?

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    They are not the most complex star systems observable; triple, quadruple, and even more complex systems have been found.
     It is impossible to observe one star actually cross in front of the other.
     Their spectral lines are not affected significantly by their mutual orbits.
     They all have very long orbital periods (well above an Earth-year in duration).
     They are all too far from Earth to be separated from each other telescopically.
asked Sep 20, 2012 in Astronomy by anonymous
    

1 Answer

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They are not the most complex star systems observable; triple, quadruple, and even more complex systems have been found.
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)

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