Planet of a red giant. Artwork of a red giant star filling the sky of a planet orbiting it. The surface of the planet,and that of its moon (upper left) has been melted by the heat of the star. 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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / DAVID A. HARDY, FUTURES: 50 YEARS IN SPACE |
Taille de l’image : | 3425 px × 2191 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |