Red giant (upper right) seen from a planet in orbit around it,computer artwork. A red giant is one of the final stages in the life of a Sun-like star. When a star runs out of hydrogen fuel at its core,the core collapses until it gets hot and dense enough for hydrogen burning to begin again. This time the reactions occur in a shell around the old dense core. This causes the outer layers of the star to expand dramatically,and the expansion also cools the gas,making it redder. The Sun will become a red giant in around five billion years | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Take 27 |
Bildgröße: | 5315 px × 3425 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |