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The 18th century
723 inventions and discoveries
| Invention or discovery | Date | Inventor or discoverer | Type |
|---|---|---|---|
| NGC 2421 | January 30, 1799 | William Herschel | open cluster |
| NGC 1331 | December 19, 1799 | William Herschel | elliptical galaxy |
| NGC 1362 | December 19, 1799 | William Herschel | lenticular galaxy |