A shaft or pit bored or dug in the ground for a specific purpose. A vertical shaft for holding a telescope that was made at Greenwich Observatory…
| 单词 | θ64760 |
| 释义 | the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > telescope > astronomical telescopes > parts of (5) well1706 A shaft or pit bored or dug in the ground for a specific purpose. A vertical shaft for holding a telescope that was made at Greenwich Observatory… declination axis1835 that axis of an equatorial telescope which is at right angles to the polar axis, and to which is attached at one end the telescope and at the other… declination circle1835 (a) (see quot. 1854); (b) the graduated circle on an equatorial telescope which marks the declinations of the heavenly bodies. telescope driver1874 a drive or mechanism for moving an astronomical telescope so as to follow the apparent motion of celestial objects; also (in recent use) a… adaptive optics1966 a system allowing a telescope to adjust its reflecting surfaces automatically in response to changes in atmospheric distortion; cf. active optics n.… |
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