"There's Arcturus looking very bright"
Depiction of Comet Donati (1858), published 1888. Arcturus to be seen at the comet's head
Public DomainDepiction of Comet Donati (1858), published 1888. Arcturus to be seen at the comet's head - Credit: E. Weiss

 Arcturus,  also known as alpha Boötis, is the brightest star in the constellation Boötes (the Herdsman). Viewed from Earth, it is the brightest star in the Northern Hemisphere and the fourth brighest star in the sky.