Mizar: A Double Star Known for Generations

My guess is Mizar is the first double star most people ever see. When Ursa Major (the “Big Dipper”) takes its place high in the springtime sky, casual skygazers can point out the bright double star in the middle of the ladle called Mizar. Its companion, called Alcor, shines almost as bright, making both starsContinueContinue reading “Mizar: A Double Star Known for Generations”

Messier 92 (NGC 6341): A Chandelier of Stars

On summer nights, when the constellation Hercules makes its way to the top of the sky, two of the greatest globular clusters tag along: Messier 13 and Messier 92. These ancient objects of the universe are must-see objects, and one can get a good view of them with a simple pair of binoculars. Many observersContinueContinue reading “Messier 92 (NGC 6341): A Chandelier of Stars”

Messier 60 (NGC 4649): Hubble’s Fastest Moving Galaxy

Messier 60 is a giant elliptical galaxy in the Virgo constellation. It’s best viewed in spring. According to NASA, M60 has a diameter of 120,000 light-years and is as massive as one trillion suns. At its center is a supermassive black hole with a mass 4.5 billion times that of our sun. It’s easy toContinueContinue reading “Messier 60 (NGC 4649): Hubble’s Fastest Moving Galaxy”