Scheat vs RR Lyrae
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Scheat
Scheat, officially designated Beta Pegasi, is a red giant star in the northern constellation of Pegasus. It forms the upper right corner of the Great Square of Pegasus, a prominent autumn asterism. The star is a semi-regular variable, meaning its brightness fluctuates over a roughly predictable period, with its radius measuring over 100 times that of the Sun. Because it has exhausted the hydrogen...
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RR Lyrae
RR Lyrae is a variable star in the constellation Lyra and the prototype of the RR Lyrae class of pulsating variable stars. These stars regularly expand and contract in size and brightness over periods typically lasting less than a day. Because their intrinsic luminosity is predictable, astronomers use them as standard candles to calculate distances to globular clusters and the galactic halo.
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