| Invention or discovery | Inventor or discoverer | Type |
|---|---|---|
| Niobium | Charles Hatchett | lithophile element |
| NGC 2938 | William Herschel | spiral galaxy |
| NGC 2977 | William Herschel | spiral galaxy |
| NGC 3061 | William Herschel | spiral galaxy |
| NGC 3144 | William Herschel | spiral galaxy |
| NGC 3155 | William Herschel | spiral galaxy |
| NGC 3197 | William Herschel | spiral galaxy |
| NGC 3329 | William Herschel | spiral galaxy |
| NGC 3500 | William Herschel | spiral galaxy |
| NGC 3752 | William Herschel | spiral galaxy |
| NGC 3735 | William Herschel | spiral galaxy |