Algol is at minimum light for about 20 minutes — as the large, dim star passes across the smaller, brighter one — then it gradually returns to normal. Algol brightens and fades almost like clockwork, but nonetheless, is still subject to small, complex changes which are of considerable interest to astronomers.
How long will ALGOL last?
Algol is at minimum light for about 20 minutes — as the large, dim star passes across the smaller, brighter one — then it gradually returns to normal. Algol brightens and fades almost like clockwork, but nonetheless, is still subject to small, complex changes which are of considerable interest to astronomers.