Artwork of a comet showing its dust and ion tails

Numéro d’image : 11883419
Artwork of a comet showing its dust and ion tails
Comet. Illustration of a comet. Two separate tails are seen here. The dust tail (yellow) consists of grains of dust pushed away from the comet's head by the radiation of sunlight. The ion tail (blue/grey) is made up of gases ionised by the effects of the solar wind. Both tails always point away from the Sun. Comets have a nucleus of ice and dust. As they approach the Sun their surface evaporates,releasing a tail millions of kilometres long. Their orbits around the Sun are highly elliptical,so that they spend most of their time as a solid,tail-less lump in the cold and distant reaches of the solar system
Licence : Droits gérés
Crédit: Science Photo Library / Garlick, Mark
Taille de l’image : 3543 px × 2598 px
Model Release : Non requis
Property Release : Non requis
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