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- Astronomical observatories493
- Landscapes286
- Observatory domes249
- Scientific expeditions223
- Mountains212
- Panoramas212
- Astronomical instruments175
- Refracting telescopes93
- Snow89
- Portraits63
- Housing51
- Reflecting telescopes50
- Spectrometer41
- Dormitories30
- Roads26
- Valleys25
- Astronomical photography22
- Outbuildings19
- Fog17
- Natural disasters17