Once Arab astronomer named star ๐๐ญ๐จ๐ฐ๐ถ๐ญ(Devil'๐ด head) because it regularly dimmed its brightness.Algol,like many others, is actually ๐
ฑ๐
ธ๐
ฝ๐
ฐ๐๐(twin)star revolving around eachother due to common center of mass gravity! When dimmer eclipsed its twin, the star appeared dim.