California nebula. Optical image of the California nebula in the constellation Perseus. The nebula appears red because the hydrogen gas it contains is excited,and gives off a characteristic red glow. The 4th magnitude star Xi Persei (below nebula at lower centre) illuminates this nebula. It is called the California nebula due to its resemblance to the shape of the US state when viewed from the west. North is at top | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Sanford, John |
Taille de l’image : | 4979 px × 3543 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |