To configure the GTE CyberTrust Global Root: Download the GTE CyberTrust Global Root from https://secure.omniroot.com/cacert/CT_Root_CA.crt and save it to a location on your computer. Note the location as you will need it for the install command below.
Because Pluto has an orbit around the Sun which is very elliptical, there are times when it crosses Neptune's orbit and becomes closer to the Sun than Neptune. For 20 years, from 1979 to 1999, Neptune was actually farther from the sun than Pluto. For now, Pluto is back to being farther from the sun. It will be more than 230 years before Neptune and Pluto trade places again. Pluto slips inside of Neptune's orbit once every 248 Earth years for a period of twenty years. 1  Javascript must be enabled to use Cool Cosmos.
So, at the moment, Pluto is the furthest of the planets from the Sun. Its distance is just over 39.5 AU. (An AU, or astronomical unit, is the mean distance of the Earth from the Sun, which is approximately 150 million kilometres). The possibility of there being another planet, the so-called Planet X, has been suggested.