Bootes And Serpens
This month the constellation Bootes is high in the sky and just past the meridian. Its prominent star called Arcturus is 37 light-years (ly) away and shines at zero magnitude. Simply follow the stars in the Big Dipper’s handle as it arcs down to Arcturus. This spectral class K0 supergiant shines 113 times brighter than our Sun measure 26 solar diameters across or one quarter the size of the orbit of Mercury.