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Purple Mountain Observatory
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| 16. Comet | 17. Domes | 18. Chromospheric | 19. Gnomom | |
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On to Page 4 ⇨ ⇦ Back to Page 2 Return to Excursions |
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| 20. Theodolite | 21. Armillary | 22. Bi-trail Meteor | ||
| Click on Any Image for a Big Picture and Description |