Algol, nicknamed the Demon Star, resides in the constellation Perseus directly below the "W" of Cassiopeia.
The name derives from Arabic "Al-Ghul," (ghoul) and may hint at its then-mysterious habit of fading away and returning to normal brightness in a matter of hours.
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During November, skygazers at mid-northern latitudes have front-row seats to one of the great dramas of Greek mythology.
The royal family of boastful Cassiopeia and her husband Cepheus soar high overhead.
The larger, fainter B star swings in front of and then behind the primary in the sequence. CHARA During eclipse, Algol fades from magnitude 2.1 (as bright as one of the Big Dipper stars) to 3.4, then returns to its original brightness.
But Perseus, the hero of this saga, swoops in to save her.What if I told you that you could stand in your front yard and watch one star eclipse another 93 light-years away from Earth with nothing but your eyeballs?As improbable as it sounds, this sight is within easy reach of northern hemisphere skywatchers once or twice a month throughout fall and winter.Dive into the different types of macromolecules, what they are made up of, and how they are built up and broken down.You, like other living systems, are an amazing energy transformer.