Helix nebula. Optical image of the Helix nebula (NGC 7293). This nebula lies around 700 light years from Earth in the constellation Aquarius and belongs to a class of objects known as planetary nebulae. Planetary nebulae are the remains of stars that once looked a lot like the Sun. When sun-like stars die,they puff out their outer gaseous layers,which are heated by the hot core of the dead white dwarf star (white dot,centre) and shine with infrared and visible colours | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / University of Arizona / Mount Lemmon SkyCenter / Adam Block |
Bildgröße: | 4588 px × 4594 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |