In many binary stars, there can be a flow of material between the two stars, disturbing the normal process of stellar evolution. As the flow progresses, the evolutionary stage of the stars will advance, even as the relative masses change. Eventually, the originally more massive star will reach the next stage in its evolution despite having lost much of its mass to its companion.
In some binary systems, the less-massive star has become a giant, while the more-massive star is still on the main sequence. If higher-mass stars evolve faster than lower-mass stars, how do the lower-mass stars in such binaries manage to leave the main sequence first? This is called the Algol paradox, after the binary system Algol.
Algol Sirius (Dog Star) has a radius of 1.711 Solar masses. Algol (El Ghoul or demon) has a radius of 2.3 Solar masses.
Algol has been visible in the night sky for over 300 million years. It would have been seen by the first creatures who looked up into the night sky. So no one can be said to have discovered Algol.
Algol
Algol or the Demon star is a star in the constellation Perseus.It has an apparent magnitude (as seen from Earth) of 2.12 or an absolute magnitude of -0.15.See related link for more information.
In some binary systems, the less-massive star has become a giant, while the more-massive star is still on the main sequence. If higher-mass stars evolve faster than lower-mass stars, how do the lower-mass stars in such binaries manage to leave the main sequence first? This is called the Algol paradox, after the binary system Algol.
algol
Algol is in the constellation Perseus.
Algol - film - was created in 1950.
ALGOL W was created in 1966.
Elliott ALGOL was created in 1962.
The Flamsteed designation of Algol is 26 Persei, see f.ex. http://en.wikipedia.org/wiki/Algol.
The duration of Algol - film - is 1.35 hours.
Transmissions from Empire Algol was created in 1995.
Algol is a bright three-star system that is part of the constellation Perseus. Other names for Algol are Demon Star, Gorgona, and El Ghoul.
Caravans to Empire Algol was created in 1994-02.
Algol (El Ghoul or demon) has a radius of 2.3 Solar masses.