GoAir, SpiceJet charge extra for excess baggage, pre-selection of seats: reports. 1  Share 0.
0-degrees Kelvin corresponds to -273-degrees Celsius. The surface of Pluto, in comparison, can range from a low temperature of 33 Kelvin (-240 degrees Celsius or -400 degrees Fahrenheit) and 55 Kelvin (-218 degrees Celsius or -360 degrees Fahrenheit). The average surface temperature on Pluto is 44 Kelvin (-229 Celsius or -380 Fahrenheit). Back in the days when Pluto was still a planet, it was the coldest planet in the Solar System. But now itâs just a regular temperature dwarf plant â poor Pluto. Neptune is now the coldest planet.
Planetary scientists have calculated Plutoâs density at between 1.8 and 2.1 g/cm 3. From this density, they have calculated that its interior is probably 50-70% rock and 30-50% ice. Decaying radioactive elements inside Pluto would heat the interior of the dwarf planet, allowing the rock and ice to move around.ut NASAâs New Horizons spacecraft is making the journey to Pluto, and will make a flyby in 2015. At that point, it will fly within 10,000 km of Plutoâs surface and send back images that show features as small as 1.6 km across.