variable star: Extrinsic Variable Stars

	Site Map \| FAQ in Daily Almanac for Nov 11, 2009 Search White Pages
Skip Navigation Home American Indian Heritage Month Atlas Encyclopedia Dictionary Thesaurus Features Quizzes Timelines Countries Slideshows

Fact Monster Kid's reference,
games, quizzes

Editor's Favorites

Encyclopedia—variable star

Extrinsic Variable Stars

Eclipsing variables are not true (intrinsic) variables but rather are binary star systems, i.e., pairs of stars revolving around a common center of mass. The apparent brightness of an eclipsing variable fluctuates because the orbit of the pair is seen edgewise, so that first one star and then the other regularly blocks the light of its companion. Best known of this type is Algol (Beta Persei).

Sections in this article:

Premium Partner Content

Related content from HighBeam Research on: variable star: Extrinsic Variable Stars

Balance problems after unilateral lateral ankle sprains (Journal of Rehabilitation Research and Development)

Reach jurors across the generations: recognizing the effects of life experiences will help you segment a jury pool into groups whose values and prejudices you can accommodate. (Trial)

The Weltons: taking care of business.(Welton Investment Corp.)(Company Profile) (Futures (Cedar Falls, Iowa))

Infoplease Tools