Arcturus

Arcturus, Alpha Boötis (α Boo), is a giant star of the spectral type K0 III located in the northern constellation Boötes. It is the brightest star in Boötes and the 4th brightest star in the sky. With an apparent magnitude of -0.05, it is the brightest star in the northern celestial hemisphere, just outshining Vega … Continue reading Arcturus