Energy production in the Sun

Videonummer 11926976
Animation showing the interior of the Sun and the reaction that provides most of its power: the process of hydrogen fusion to form helium. The centre of the Sun contains protons (orange), neutrons (green) and gamma ray energy (blue lines). The energy is released by the so-called proton-proton chain. This involves several steps: first, two protons collide, and one is converted into a neutron, forming a deuterium (hydrogen-2) nucleus, and emitting a positron and neutrino (both yellow). The deuterium nucleus then collides with another proton, forming an atom of helium-3 and releasing another gamma ray. Next, two helium-3 nuclei collide to produce a helium-4 nucleus, plus two protons.<br>Restrictions:<br>Restrictions:<br>Restrictions:<br>Restrictions:
Lizenzart: Lizenzpflichtig
Credit: SCIENCE PHOTO LIBRARY / HUBBLE / ESA / LARS LINDBERG CHRISTENSEN
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Länge: 32 Sekunden
Seitenverhältnis: 4:3
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