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- Astronomical observatories496
- Landscapes355
- Observatory domes260
- Panoramas227
- Mountains221
- Astronomical instruments192
- Astronomical photography119
- Refracting telescopes97
- Portraits96
- Snow94
- Landscape photography62
- Moon53
- Housing52
- Reflecting telescopes51
- Spectrometer45
- Nebulae43
- Dormitories34
- Scientific expeditions32
- Roads30
- Valleys30