Humans are adapted to live on one planet, Earth, and not all of it mind you, just a large band of it, and there aren’t many of this type of planets out there. The latest trailer leading up to No Man’s Sky has been released. The Survive trailer is showing off different biomes that you can and will encounter, as well as showing us a peak at the types of modifications we will have to deal with to protect ourselves.
So, not only do you have to worry about the wildlife and plant life out there, but also the planets. It can get mighty annoying when you are on a planet at 50 Kelvin (around -223c) and your thermal protection starts running out of power.
Bit of science as well, the Kelvin scale starts at zero which is absolute zero, which is -273.16c, and goes up at the same scale as Celsius, so the freezing point of water is 273.16K or 0c.