Sun. Computer artwork of the Sun. The granulated appearance is due to turbulence in its surface. The Sun is a massive nuclear fusion reactor in which hydrogen atoms fuse to form helium to release heat and light energy. The core has a temperature of at least 14 million degrees Celsius. This energy radiates out to the visible surface (the photosphere),which is about 300 kilometres thick. The photosphere is affected by magnetic fields,producing phenomena like sunspots (cool areas); solar prominences (eruptions of charged particles) and solar wind,not seen here. Its constant output of energy means that the Sun loses about 4 million tonnes of mass each second | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kulyk, Mehau |
Taille de l’image : | 4384 px × 3366 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |