Variable Star Algol
Numéro d’image : 12582663
| Algol, designated Beta Persei and known as the Demon Star, is a bright multiple star in Perseus constellation, located 93 light-years from Earth. It is one of the first variable stars to be discovered. Algol is a three-star system in which the hot luminous primary member and the larger, but cooler and fainter secondary member regularly pass in front of each-other causing eclipses. Thus Algol's luminosity regularly dips to about 1/3 its normal brightness. The period of variability is 2, 86 days and the eclipse lasts about 10 hours. This image was created from photographic material taken with the 1.22-metre Oschin Telescope at Mount Palomar Observatory, forming part of the Digitized Sky Survey 2. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / De Martin, Davide |
| Taille de l’image : | 5910 px × 5915 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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