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- Astronomical observatories[remove]492
- Observatory domes243
- Landscapes188
- Astronomical instruments170
- Mountains147
- Panoramas138
- Refracting telescopes89
- Snow77
- Reflecting telescopes49
- Housing48
- Spectrometer39
- Dormitories27
- Portraits23
- Buildings15
- Outbuildings15
- Astronomical photometry14
- Carriages and carts12
- Micrometers (Instruments)10
- Roads10
- Scientific apparatus and instruments9