Comet surface. Artwork of the surface of a comet as it approaches the Sun (at centre left). Vapours are rising from the comet as it is heated by the Sun,which is seen here with a halo around it. Comets are balls of ice and dust which are a few kilometres (km) across,some of which is vaporised as it passes near the Sun. The gas and dust are blown away from the comet by the solar wind,a stream of charged particles coming from the Sun. The gas and dust form a tail which can be millions of km long. The tail always extends away from the Sun,whatever direction the comet is travelling. The remnants of comet tails sometimes strike the Earth as meteor showers | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Foster, John |
Taille de l’image : | 5315 px × 3588 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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