a telescope mounted so that it rotates vertically about a fixed horizontal axis, used for measuring the altitudes of stars and timing their transit…
| 单词 | θ1425 |
| 释义 | the world > the universe > cosmology > science of observation > astronomical instruments > transit instrument > [noun] (7) transit instrument1744 a telescope mounted so that it rotates vertically about a fixed horizontal axis, used for measuring the altitudes of stars and timing their transit… transitory1744 A transit instrument or telescope. Obsolete. rare. transit circle1793 a transit telescope equipped with a large graduated circle, by which the right ascension and declination of a star may be determined by observation… meridian circle1809 Astronomy. = transit circle n. at transit, n. compounds 2. Subcategories:— part (2) — deviation of (1) |
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