| astronomical telescope | sensitization | Rubidium |
| mirror | heliostat | UV perspective |
| Lüeshe perspective | Atomic Clock | cent slave clock |
| transit instrument | equatorial | circularity solar |
| solar telescope | colour ball telescope | finder |
| Photograph Vertex cartridge | Orbit apollo ap | Pupil photometer |
| Electrofax | astronomical exposure | astrographic camera |
| infrared telescope | microcrystalline glass | einstein Observatory |
| coelostat | Photon count | planetarium |
| bullfrog | excessive Mirror plane perspective | skies facility |
| parabolic mirror | equator device | Flash as comparator |
| horizon device | break reflecting telescope | refracting telescope |
| optics perspective | photoelectric astrolabe | zenith telescope |
| Mere this cross | Schmidt perspective | Material side prism |
| orbit Observatory | coronagraph | Fork device |
| Newtonian telescope | Very large array | dish |
| Galilean glasses | Newton focus | seamless Photographic apparatus |
| Billabong Zhixiangguan | Guangshen transit instrument | Shimite Amend lens |
| effective aperture | contour follower | main Focus |
| Synthesis Aperture | Stars [pl] horoscope Concision apparatus | astronomical spectrograph |
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| More results... |