Algenib

Its story

Algenib is a faintly variable blue star marking one corner of the Great Square of Pegasus, that vast autumn rectangle visible across most of the northern hemisphere. Hot and pulsating, it beats with a rhythm barely perceptible to the eye. Its light takes some 392 years to cross the void to us: what tonight traces the geometry of the winged horse set out when European mathematicians were uncovering the first laws of planetary motion.