Hodographs -with display of a few velocity vectors- of 5 of the 9 planets of the Solar System during three plutonian years [Hodographes -avec visualisation de quelques vecteurs vitesses- de 5 des 9 planètes du système solaire pendant trois années plutoniennes].

In the following visualization the velocity vectors -displayed with a common origin- of the 9 planets of the Solar System are computed during one plutonian year (and not three...):

When one use a common origin (the picture center) for all velocity vectors of each planet one can notice that the non still extremities are moving along quasi-circles (the so called hodograph(s)). Only the Earth -dark blue-, Jupiter -orange-, Saturn -yellow-, Uranus -cyan- and Neptune -light blue- are displayed. In particular Pluto cannot be there for it is not in the same plane (ecliptic) than the other planets...

For a given planet -the Earth for example- the angular distance between two consecutive velocity vectors could seem strange. It is due to the fact that only a few velocity vectors are displayed and that each trajectory is covered many times (730 times for the Earth) during the computation. It looks like a stroboscopic effect...

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