https://www.theastrogeek.com/dark_sky_journal/2014/5/14/mizar-and-alcor
Mizar and Alcor — The Astro Geeks | Astrophotography
Mizar and Alcor together are sometimes called the "Horse and Rider", and the ability to resolve the two stars with the naked eye is often quoted as a test of...
mizar and alcorthe astrogeeksastrophotography