英仙座, known as Perseus in English, is a prominent constellation in the northern sky. It is named after the Greek hero Perseus, who is famous for slaying the Gorgon Medusa. The constellation is best visible during the autumn months and contains several notable stars and deep-sky objects. One of the most famous features of 英仙座 is the Perseids meteor shower, which occurs annually in August. This meteor shower is caused by the Earth passing through the debris left by the comet Swift-Tuttle. 英仙座 also includes the bright star Mirfak and the double star Algol, which is known for its variability in brightness.