The two stars near one another are shown. Positions of one member are shown relative to the other star at different times. From plots like this one, astronomers conclude that

Question

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The plots show the positions of both stars relative to each other, which allows the astronomers to conclude that both stars are in an elliptical orbit around one another. Therefore, option D is the correct choice. The mass of the pair can also be estimated from these plots, but this is not the only conclusion that can be reached. Option A is too specific, and option C is not supported by the plots.

The Two Stars near One Another Are Shown