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All Star Line Up: Algol - Windows to the Universe

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Algol is actually two stars. Star A is separated from close companion B by less than one tenth of the Earth-Sun distance, and partially eclipses every 2.9 days.
Click on image for star map
© Jens Dengler, reproduced with permission.

Algol

What's in a Name: Arabic for "head of the demon"
Claim to Fame: Represents Medusa's eye in Perseus. A special variable
star that "winks" every 3 days.
Type of Star: Blue-white Main Sequence Star, and a yellow Subgiant
How Far Away: 105 light years away
How Bright: Almost 100,000 times brighter than the Sun!
Where to View: In the constellation Perseus the Hero
When to View:November through March

Last modified March 1, 2005 by Travis Metcalfe.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF