Rasalgethi (Alpha Herculis): Magnificent Red Supergiant with a Bluish Friend

You can view the multiple star system Rasalgethi from the city without the aid of binoculars or a telescope. As a star in the constellation Hercules, it is viewable in late spring through summer. This red supergiant lies 380 light years away from us with a radius 400 times larger than our own sun! AccordingContinueContinue reading “Rasalgethi (Alpha Herculis): Magnificent Red Supergiant with a Bluish Friend”