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Picture of the day Caesio teres in Fiji   Tweet   ·   Subscribe   ·  Previous Pictures of the day Media of the day Algol (β Persei) is a triple-star system (Algol A, B, and C) in the constellation Perseus, in which the large and bright primary Algol A is regularly eclipsed by the dimmer Algol B every 2.87 days. The eclipsing binary pair is separated by only 0.062 astronomical units (AU) from each other, so close in fact that Algol A is slowly consuming the less massive Algol B by continually stripping off Algol B's outer layers. This animation was assembled from 55 images of the CHARA interferometer in the near-infrared H-band, sorted according to orbital phase.   Problems playing the file? Previous Media of the day Participating Browsing? Please use the search box at the top of this page or the links to the right. Feel free to subscribe to our syndicated feeds. Using? To fulfill the free license requirements, please read our Reuse guide. You can also request a picture. Identifying? Have a browse through Category:Unidentified subjects. If you find something you can identify, write a note on the item's talk page. Creating? Check out all you need to know at our Contributing your own work guide. and more! To explore more ways you can contribute to this project, check out the Community Portal.

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