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Purple Mountain Observatory
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| 16. Comet | 17. Domes |
18. Chromospheric
Telescope Dome |
19. Gnomom | |
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On to Page 4 Back to Page 2 Back to Noll Excursions Back to China Choices |
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20. Tracking
Theodolite |
21. Armillary
Sphere |
22. Bitrail Meteor | ||
| Click on Any Image for a Big Picture and Description |