Helix Nebula (NGC 7293),optical image. This is a planetary nebula,a series of shells of gas cast off by a dying star. The ejection of the star's outer layers exposes its hot core,whose radiation ionises the shells,causing them to glow. The Helix Nebula is 650 light years from Earth,in the constellation of Aquarius. This image includes filters for the light from hydrogen (H-alpha),oxygen (OIII) and sulphur (SII) ions | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Dodd, Dr. Luke |
Bildgröße: | 3458 px × 2539 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |