12 Feb 2024
The nebula glows in the red part of the spectrum because the powerful ultraviolet radiation from the stars strips electrons from the nebula's hydrogen atoms. The Rosette Nebula is a very active stellar nursery.
Caldwell 49
6 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Halpha | 281 | 2h30m | 32 |
| SII | 300 | 2h40m | 32 |
| OIII | 319 | 2h45m | 31 |