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Lowell Observatory (1916).
| Lowell Observatory observer's chair where Percival Lowell sat to draw the canals of Mars.
| Lowell Observatory telescope.
| Lowell Observatory observation dome used in the discovery of planet Pluto.
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Lowell Observatory Pluto observation dome detail.
| Lowell Observatory small telescope with photo plate unit used in the discovery of planet Pluto.
| Percival Lowell (1855-1916) mausoleum at Lowell Observatory.
| Painting of Percival Lowell & astronomy discoveries at Lowell Observatory.
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Meeting hall at Lowell Observatory.
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