hip-104371

Its story

In Cygnus, that elongated cross flying over the summer Milky Way, pulses a variable blue-white B-class star whose light set out over three and a half centuries ago, in the days when Newton was publishing the Principia. Its brightness does not hold still: it breathes in a slow, subtle rhythm. Hot and luminous, it travels through Cygnus's crowded fields like a beacon softly blinking over one of the year's loveliest stellar roads.