Recent Examples of variable star from the Web
So far, astronomers have estimated those distances using data from 10 well-studied, long-period variable stars in the Milky Way.
For the local universe, these mile markers are Cepheid variable stars, which periodically pulse and share the same intrinsic brightness.
Haro discovered flare stars, variable stars which experience unpredictable surges in brightness.
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Britannica.com: Encyclopedia article about variable star
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