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- Astronomical observatories452
- Landscapes250
- Observatory domes229
- Mountains182
- Panoramas181
- Astronomical instruments156
- Refracting telescopes92
- Snow89
- Portraits59
- Housing51
- Reflecting telescopes37
- Spectrometer37
- Dormitories30
- Roads26
- Valleys23
- Outbuildings19
- Astronomical photography17
- Natural disasters17
- Buildings16
- Fog16