| Invention or discovery | Inventor or discoverer | Type |
|---|---|---|
| Juglar cycle | Clément Juglar | business cycle |
| NGC 3221 | Heinrich Louis d'Arrest | spiral galaxy |
| NGC 3287 | Heinrich Louis d'Arrest | spiral galaxy |
| NGC 2699 | Heinrich Louis d'Arrest | elliptical galaxy |
| NGC 2569 | Heinrich Louis d'Arrest | lenticular galaxy |
| NGC 3251 | Heinrich Louis d'Arrest | spiral galaxy |
| NGC 4269 | Heinrich Louis d'Arrest | lenticular galaxy |
| NGC 4324 | Heinrich Louis d'Arrest | lenticular galaxy |
| NGC 2749 | Heinrich Louis d'Arrest | elliptical galaxy |
| 73 Klytia | Horace Parnell Tuttle | asteroid |
| NGC 3806 | Heinrich Louis d'Arrest | low-surface-brightness galaxy |
| NGC 4257 | Heinrich Louis d'Arrest | spiral galaxy |
| NGC 3012 | Heinrich Louis d'Arrest | elliptical galaxy |
| NGC 587 | Heinrich Louis d'Arrest | intermediate spiral galaxy |
| NGC 721 | Heinrich Louis d'Arrest | spiral galaxy |
| NGC 472 | Heinrich Louis d'Arrest | lenticular galaxy |
| NGC 162 | Herman Schultz | star |
| NGC 502 | Heinrich Louis d'Arrest | lenticular galaxy |
| NGC 522 | Heinrich Louis d'Arrest | spiral galaxy |
| NGC 525 | Heinrich Louis d'Arrest | lenticular galaxy |