In the diagram above, adapted from Newton’s diagram in his 1687 Philosophiae Naturalis Principia Mathematica, we see the effect of gravitation on a comet that was visible between 1680 and 1681 ...

This space wallpaper is an orbit diagram for the outer solar system. The sun and terrestrial planets are at the center. The orbits of the four giant planet Jupiter, Saturn, Uranus and Neptune are ...