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mizar
The second-magnitude star that marks the bend in the handle of the Big Dipper, ζ Ursae Majoris. Mizar was the first telescopic visual binary to be discovered (1650), the first ever to be photographed (1857), and the first star discovered to be a spectroscopic binary (1889). Its distance to the Sun is 24 parsecs (7.5 × 1014 km or 4.7 × 1014 mi).
- 词性: noun
- 行业/领域: 科学
- 类别 普通科学
- Company: McGraw-Hill
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- Francisb
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