The Sky at Night

Season 19 Episode 3: Algol: The Winking Demon

Algol, the Demon Star, is now well on view during the evening. Every two-and-a-half days the star seems to give a long, slow ' wink.' Patrick Moore describes this remarkable eclipsing binary and explains its importance.

Genre:

Documentary, News

Seasons:

70

Episodes:

847

Quality:

HD

Status:

Returning Series

First Air:

1957

IMDb:

8.4