3 ms·

It's cold out there, why would it melt?

• DecentShoes 11mo ago
  Radiation?
• jethronethro 11mo ago
  Heat ray from a passing flying saucer?
• lmm 11mo ago
  It's got a very long time to do so. Like how a bowl of water evaporates at room temperature.
• hdgvhicv 11mo ago
  It would ablate due to interstellar hydrogen, but that’s so rare over a billion years you’re taking a few millimetres.