That's the problem in the vacuum of space. It's a vacuum, so heat dissipation is slow because there is nowhere for the heat energy to transfer to.
Edit: the above relates to convection. Radiation still works on the non-sunward sides.
That's the problem in the vacuum of space. It's a vacuum, so heat dissipation is slow because there is nowhere for the heat energy to transfer to.
Edit: the above relates to convection. Radiation still works on the non-sunward sides.