If it is still considered a planet, and not a large asteroid or a planetoid as it was recently classified, Pluto is the one with the lowest temperatures in the solar system. Although it is not well known, the temperature on the Plutonian surface could reach 235 ° C below zero . Just as icy is its moon Charon , 1,172 km in diameter, which was discovered in 1978 by Jim Christy.
Another icy ball in the Solar System turns out to be Triton , Neptune's seventh moon. Recent measurements indicate that it is as cold as Pluto and its satellite, since the surface temperature is also close to -235º C. This is partly explained by its high albedo -relation between the percentage of reflected radiation and that received-.
