--- name: Mizar a Alcor (ΞΆ a 80 UMa) constellation: UMa created_by: editor.cs created_date: 2023-11-07 09:27:53.053940 updated_by: editor.cs updated_date: 2023-11-07 09:27:53.053945 --- The most famous binary star, which Arabs used to call "guide" or "sharpness tester of vision". The mutual distance between the two stars is 12', so a healthy eye can easily distinguish them practically always. They form a nice pair even in a telescope.