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The plasma tails of comets point directly away from the Sun and are longest when nearest to the Sun. The orbit of a reference planet is shown in dark blue. Because the position of the planet changes, the orientation of the comet tail may not seem obvious when viewed from the planet.
Contributed by: Jeff Bryant (March 2011)
Open content licensed under CC BY-NC-SA
Wolfram Demonstrations Project
Published: March 7 2011