An instrument for measuring the intensity of the blue of the sky.
| 单词 | θ1464 |
| 释义 | the world > the universe > cosmology > science of observation > astronomical instruments > observational instruments > [noun] > sky (2) cyanometer1829 An instrument for measuring the intensity of the blue of the sky. uranophotometer1876 a device for measuring the intensity of the diffuse light of the sky. |
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