Emission nebulae. Optical image of part of NGC 6559,a large area of emission nebulae. A nebula consists of gas and dust. An emission nebula has been heated by nearby stars until the hydrogen gas in it glows red. Star formation can take place when a nebula collapses. Dark nebulae (ones that do not reflect or emit light) are seen silhouetted against the emission nebulae. These nebulae are in the constellation Sagittarius | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Cuillandre, Jean-Charles / Canada-France-Hawaii Telescope |
Bildgröße: | 3720 px × 4650 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |