"The Guardian of the Bear" is the brightest star in the northern sky and the fourth brightest overall (0.0 mag) after Sirius, Canopus, and Alpha Centauri. It is aimed at by a fourfold extended line connecting the stars of the Big Dipper downwards. Arcturus is the closest orange giant, located 35 light-years away with a diameter of around 30 million kilometers. It is 20 times larger than the Sun, but its luminosity exceeds it by up to 100 times.