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Finally, stars beta Persei, rho Persei, and pi Persei form Perseus' right leg and foot. Reference * H. A. Rey, The Stars — A New Way To See Them. Enlarged World-Wide Edition. Houghton Mifflin, Boston, 1997. ISBN 0-395-24830-2. Stars ...
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The prototype of the Algol type variable stars is Algol, or beta Persei. Its variability was first recorded in 1667 by Geminiano Montanari. The mechanism for its being variable was first correctly explained by John Goodricke in 1782.
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The star that Ptolemy called ‘the bright one in the Gorgon head' is Beta Persei, named Algol from the Arabic ra's al-ghul meaning ‘the demon's head'.
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Gorgona; Gorgonea Prima; Demon Star; El Ghoul. Beta Persei HR 936 HD 19356 ...
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Eclipsing bin aries may therefore be detected by brightness variations of the binary system. The most famous are beta Persei ( Algol), which varies from 3.4 to 2.1 over 2.87 days, and gamma Persei, which varies by three magnitudes over 14 years.
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See also: Algol, Star, Orbit, Constellation, Magnitude
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