Zoom in to Helix Nebula

Videonummer 11926834
Zoom in to the Helix Nebula (NGC 7293), a planetary nebula some 700 light years away in the constellation Aquarius. The shells of gas were ejected by a Sun-like star at the end of its life, which has since become a hot white dwarf star. The blue-green glow in the centre of the Helix comes from oxygen ionised by the intense ultraviolet radiation from the 120 000 degree Celsius central star. Further out from the star and beyond the ring of knots, the red colour from hydrogen and nitrogen is more prominent.<br>Restrictions:
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Credit: Science Photo Library / EUROPEAN SOUTHERN OBSERVATORY
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Länge: 50 Sekunden
Seitenverhältnis: 16:9
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