czsky/en/star/hr5054.md

439 B

name constellation created_by created_date updated_by updated_date
Mizar a Alcor (ζ a 80 UMa) UMa editor.cs 2023-11-07 09:27:53.053940 editor.cs 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.