| 单词 | astrolabe |
| 释义 | astrolabe (once / 16416 pages) n An astrolabe is an ancient instrument used for estimating the altitude and predicting the position of celestial objects, such as the moon, other planets, and stars. The ancient Greeks created most of the fields of study that exist today, and along the way they created many clever devices. One was the astrolabe. An astrolabe had the same purpose as the sextant, which came later: to make astronomical measurements. An astrolabe was portable, and it consisted of a metal disc, a sighting arm, and several rotating parts used in estimating unfathomable distances. The astrolabe was an important invention in the history of astronomy and astrology. WORD FAMILYastrolabe: astrolabes USAGE EXAMPLESThere are manuscripts, maps, paintings, sculptures, architectural fragments, reliquaries, ceramics, glass, fabrics, astrolabes, jewelry, weapons, and, especially, books—in nine alphabets and twelve languages. The New Yorker(Sep 26, 2016) When: “Astrolabe” at Selwyn opens Saturday and runs through Oct. Los Angeles Times(Sep 16, 2016) For the first half century after its discovery, researchers believed that the Antikythera Mechanism had to be something simpler than it seemed, like an astrolabe. Washington Post(Jun 14, 2016) n an early form of sextant Hyper sextant a measuring instrument for measuring the angular distance between celestial objects; resembles an octant |
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