Red giant Sun engulfing Earth

Videonummer 11926930
Animation showing the Sun swelling to a red giant star and engulfing planet Earth. Stars like the Sun become red giants near the end of their lives. When they run out of hydrogen fuel at their centre, a dense helium core forms, and the star begins burning hydrogen in a shell around it. This causes the outer layers of the star to expand greatly, and the expansion causes cooling and reddening. The Sun is predicted to expand to the orbit of Earth in around five billion years. However the planet will be long dead by that stage, as increasing energy from the Sun will have boiled off the oceans and atmosphere completely within three billion years.<br>Restrictions:
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / HUBBLE / ESA / LARS LINDBERG CHRISTENSEN
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Länge: 35 Sekunden
Seitenverhältnis: 4:3
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