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- Astronomical observatories493
- Landscapes286
- Observatory domes250
- Scientific expeditions223
- Mountains212
- Panoramas212
- Astronomical instruments195
- Refracting telescopes93
- Snow89
- Portraits72
- Housing51
- Reflecting telescopes50
- Spectrometer41
- Dormitories30
- Roads26
- Valleys25
- Scientific apparatus and instruments23
- Astronomical photography22
- Outbuildings19
- Telescopes18