| 单词 | heliometer |
| 释义 | heliometer (once / 166470 pages) n WORD FAMILY heliometer: heliometers USAGE EXAMPLESNor is it difficult to imagine the probable course of reasoning which led Bessel to select the model of his new heliometer. Various, Encyclopaedia Britannica, 11th Edit...(2012) They are obtained from late improved measures of the velocity of light, and from measures by the heliometer. Various, Scientific American Supplement, No....(2011) Gill’s Heliometer results all lie very near 93 millions. Turner, Herbert Hall, Astronomical Discovery(2010) n an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope Hyper measuring device, measuring instrument, measuring system instrument that shows the extent or amount or quantity or degree of something |
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