
This image is a plot of the perihelion distance of Jupiter for 33 orbits.
Notice the break of the trend line at the most recent closest approach.
Jupiter is the most massive planet in the solar system. Jupiter and Venus
are responsible for a total of 2% of tidal motion on Earth, 1% each. The
significances of the trend is that the closest approach of Jupiter to the Sun
is the closest approach of Earth to Jupiter. As Earth moves away from the
Sun it cools, and if solar cycle 24 is an example then the size of the
chronosphere may also shrink.