Star Systems and Galaxies
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Describing Binary Systems
Complete the paragraph to describe binary systems.
A binary star system is made of| stars, one of which is brighter than the other. Astronomers are able to detect
the dimmer star because its gravity causes the bright star to
Astronomers can also spot the dimmer
star by observing a phenomenon called a (n)
binary. This happens when the dim star passes in
front of the bright star.
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