Winter Hexagon Over Stagecoach Colorado . ... The Winter Hexagon involves some of the brightest stars visible, together forming a large and easily found pattern in the winter sky of Earth 's northern hemisphere . The stars involved can usually be identified even in the bright night skies of a big city , although here they appear over darker Stagecoach , Colorado , USA.. ... Best Astronomy Images: APOD Editor to speak in Philadelphia and New York City this week . ... NASA Official: Jay Norris. ...