A report on Mizar, Double star and Ursa Major

The Big Dipper's bowl and part of the handle photographed from the International Space Station. Mizar and Alcor are at the upper right.
Astronomers have mistakenly reported observations of a double star in place of J 900 and a faint star in the constellation of Gemini.
The constellation Ursa Major as it can be seen by the unaided eye.
The multiple star system of Mizar (the double star on the right) and Alcor (left). The unrelated, fainter star Sidus Ludovicianum can be seen lower down.
Artist's impression of the discs around the young stars HK Tauri A and B.
Ursa Major and Ursa Minor in relation to Polaris
Radial velocity curves for the two almost identical components
Ursa Major shown on a carved stone, c.1700, Crail, Fife
H. A. Rey's alternative asterism for Ursa Major can be said to give it the longer head and neck of a polar bear, as seen in this photo, from the left side.
Ursa Major as depicted in Urania's Mirror, a set of constellation cards published in London c.1825.
Johannes Hevelius drew Ursa Major as if being viewed from outside the celestial sphere.
Starry Night Over the Rhone by Vincent van Gogh (1888)
Polaris and the Big Dipper on the flag of Alaska.
The Pinwheel Galaxy

Mizar is a second-magnitude star in the handle of the Big Dipper asterism in the constellation of Ursa Major.

- Mizar

It forms a well-known naked eye double star with the fainter star Alcor, and is itself a quadruple star system.

- Mizar

Mizar, in Ursa Major, was observed to be double by Benedetto Castelli and Galileo.

- Double star

ζ Ursae Majoris, Mizar, the second star in from the end of the handle of the Big Dipper, and the constellation's fourth-brightest star. Mizar, which means "girdle," forms a famous double star, with its optical companion Alcor (80 Ursae Majoris), the two of which were termed the "horse and rider" by the Arabs.

- Ursa Major
The Big Dipper's bowl and part of the handle photographed from the International Space Station. Mizar and Alcor are at the upper right.

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