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- Astronomical observatories[remove]497
- Observatory domes244
- Landscapes189
- Astronomical instruments173
- Mountains147
- Panoramas139
- Refracting telescopes91
- Snow77
- Reflecting telescopes49
- Housing48
- Spectrometer40
- Dormitories27
- Portraits25
- Buildings15
- Outbuildings15
- Astronomical photometry14
- Carriages and carts12
- Micrometers (Instruments)11
- Roads10
- Scientific apparatus and instruments9