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The 18th century
723 inventions and discoveries
| Invention or discovery | Date | Inventor or discoverer | Type |
|---|---|---|---|
| NGC 2755 | March 18, 1787 | William Herschel | radio galaxy |
| NGC 2844 | March 18, 1787 | William Herschel | spiral galaxy |
| NGC 2852 | March 18, 1787 | William Herschel | spiral galaxy |
| NGC 2853 | March 18, 1787 | William Herschel | lenticular galaxy |
| NGC 3104 | March 18, 1787 | William Herschel | interacting galaxy |
| NGC 3941 | March 19, 1787 | William Herschel | lenticular galaxy |
| NGC 2691 | March 20, 1787 | William Herschel | spiral galaxy |
| NGC 2759 | March 20, 1787 | William Herschel | lenticular galaxy |
| NGC 4203 | March 20, 1787 | William Herschel | lenticular galaxy |
| NGC 4359 | March 20, 1787 | William Herschel | spiral galaxy |
| NGC 4627 | March 20, 1787 | William Herschel | elliptical galaxy |
| NGC 4655 | April 9, 1787 | William Herschel | elliptical galaxy |
| NGC 4690 | April 11, 1787 | William Herschel | lenticular galaxy |
| NGC 1343 | October 11, 1787 | William Herschel | intermediate spiral galaxy |
| NGC 896 | November 3, 1787 | William Herschel | H II region |
| NGC 2126 | November 12, 1787 | William Herschel | open cluster |
| NGC 4143 | January 14, 1788 | William Herschel | lenticular galaxy |
| NGC 3205 | February 3, 1788 | William Herschel | spiral galaxy |
| NGC 3207 | February 3, 1788 | William Herschel | astronomical radio source |
| NGC 3319 | February 3, 1788 | William Herschel | Seyfert galaxy |
| NGC 3374 | February 3, 1788 | William Herschel | radio galaxy |
| NGC 3891 | February 3, 1788 | William Herschel | spiral galaxy |
| NGC 3971 | February 3, 1788 | William Herschel | lenticular galaxy |
| NGC 2389 | February 5, 1788 | William Herschel | astronomical radio source |
| NGC 2532 | February 5, 1788 | William Herschel | intermediate spiral galaxy |
| NGC 2649 | February 5, 1788 | William Herschel | intermediate spiral galaxy |
| NGC 3191 | February 5, 1788 | William Herschel | spiral galaxy |
| NGC 3583 | February 5, 1788 | William Herschel | spiral galaxy |
| NGC 3595 | February 5, 1788 | William Herschel | lenticular galaxy |
| NGC 3726 | February 5, 1788 | William Herschel | spiral galaxy |
| NGC 3985 | February 5, 1788 | William Herschel | spiral galaxy |
| NGC 2326 | February 9, 1788 | William Herschel | radio galaxy |
| NGC 2340 | February 9, 1788 | William Herschel | elliptical galaxy |
| NGC 3811 | February 9, 1788 | William Herschel | spiral galaxy |
| NGC 3896 | February 9, 1788 | William Herschel | lenticular galaxy |
| NGC 4047 | February 9, 1788 | William Herschel | spiral galaxy |
| NGC 4248 | February 9, 1788 | William Herschel | irregular galaxy |
| NGC 4617 | February 9, 1788 | William Herschel | spiral galaxy |
| Lord Howe Island | February 17, 1788 | Henry Lidgbird Ball | island |
| NGC 2684 | March 9, 1788 | William Herschel | spiral galaxy |
| NGC 2854 | March 9, 1788 | William Herschel | spiral galaxy |
| NGC 2856 | March 9, 1788 | William Herschel | spiral galaxy |
| NGC 3893 | March 9, 1788 | William Herschel | intermediate spiral galaxy |
| NGC 3320 | April 1788 | William Herschel | spiral galaxy |
| NGC 3577 | April 1788 | William Herschel | spiral galaxy |
| NGC 2810 | December 3, 1788 | William Herschel | elliptical galaxy |
| NGC 1444 | December 18, 1788 | William Herschel | open cluster |
| NGC 2254 | December 28, 1788 | William Herschel | star cluster |
| NGC 2965 | December 31, 1788 | William Herschel | lenticular galaxy |
| Uranium | 1789 | — | lithophile element |
| Zirconium | 1789 | Jöns Jacob Berzelius | lithophile element |
| NGC 2530 | February 22, 1789 | William Herschel | spiral galaxy |
| NGC 2582 | February 22, 1789 | William Herschel | intermediate spiral galaxy |
| NGC 3687 | February 22, 1789 | William Herschel | spiral galaxy |
| NGC 4626 | March 20, 1789 | William Herschel | spiral galaxy |
| NGC 4628 | March 20, 1789 | William Herschel | spiral galaxy |
| NGC 4671 | March 20, 1789 | William Herschel | elliptical galaxy |
| NGC 3652 | March 23, 1789 | William Herschel | spiral galaxy |
| NGC 3658 | March 23, 1789 | William Herschel | lenticular galaxy |
| NGC 3298 | April 12, 1789 | William Herschel | brightest cluster galaxy |