Pluto is so cold because it is hazy and far from the sun
When the New Horizons spacecraft arrived at Plutoin 2015, the probe revealedthe dwarf planet'strue nature: Pluto is a frozen lump, sure, but it is an odd and interesting lump. Pluto has a heart-shaped icecap that, in theory, could hidean ocean. For no obvious reason, Pluto spits out X-rays. And when New Horizons took Pluto's temperature,