PLUTO 5.91 billion km from Sun 2,274 km in diameter -400 F lowest temp Methane .03 Nitrogen .03 247.7 years 122.52 -6.3872 no data 15.12 NEPTUNE 4.50 billion km from Sun 49,500 km in diameter -360 F lowest temp Methane 2% Hydrogen 85% Helium 13% 164.8 years 28.31 no data 16.11 7.84 URANUS 2.87 billion km from Sun 51,800 km in diameter -193 C lowest temp Methane 2% Hydrogen 83% Helium 15% 84.01 years 97.86 no data -17.9 5.52 EARTH 149.6 million km from Sun 12,756 km in diameter 15 C lowest temp Nitrogen 77% Oxygen 21% Other 2% 365.3 days 23.45 .99727 .239345 no data VENUS 108.2 million km from Sun 12,104 km in diameter 482 C lowest temp Carbon Dioxide 96% Nitrogen 3% Other 1% 224.7 days 177.36 -243.0187 no data -4.4