In 1650 Mizar was the first double one of these discovered; today we know it's actually a quadruple
[1] ... 
to be one star in the middle of the Great Bear's tail, when there are actually two, 
.... Today it's clear that the attempt to use observations of Mizar to support the... [DOC] [TLE] Astronomers' Observing Guides [PAR] more we know about these fascinating objects, the more enjoyment we will ulti- ... 
are two carefully compiled observing rosters  one showcasing 100 of the sky's 
finest double and multiple stars for viewing with telescopes from 2 to 14 ... 
Telescope and its parent company Sky Publishing Corporation have been 
especial-.