Three types of binary stars.
Three types of binary stars.
Three types of binary stars.
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What did we find out?<br />
• When the <strong>stars</strong> are farther apart (a is increased)<br />
they move more slowly in their orbit.<br />
• Measuring the time it takes for the spectral lines<br />
to return to their starting wavelength gives us<br />
the orbital period
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