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Set B3 - Out Into Space - card information

38. Ursa Minor
(The Little Bear)

38. Ursa Minor (The Little Bear)

Like Ursa Major, though smaller, it is easily distinguished by seven main stars. It contains Polaris (North Pole Star), a yellow star of second magnitude of utmost use to mariners and astronomers. To ordinary observers, Polaris appears to be the only star which never changes position; actually it does so very slightly, describing a circle of 2° 25' daily about the true Pole. Illustration shows position of Little Bear at 11.30 p.m. on first day of the month indicated. Thales, Greek astronomer in 7th Century B.C., recommended its use for navigation.