Binary (Double) Stars Can Be Detected by

question 126

Multiple Choice

Binary (double) stars can be detected by

• A)being seen as two separate stars with a telescope.
• B)one star traveling a wiggly proper-motion path across the sky.
• C)one star dimming abruptly as another passes in front of it.
• D)pairs of absorption lines seen in the spectrum of what appears to be one star.
• E)All of the other choices are correct.

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