Emission nebula,artwork. Emission nebulae are vast clouds of gas and dust that emit light due to ionisation of the hydrogen gas they contain by radiation from hot young stars within them. Stars form when gas contracts under mutual gravitational attraction. As the gas gets denser,its temperature rises. When the gas is extremely hot and dense,nuclear reactions begin,and a star is born | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Tucciarone, Joe |
Bildgröße: | 4200 px × 4160 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |