Bigger heatsink would be the target, but you gotta get it up there. On moon is not a half bad idea. Bury the heatsink and use the moon itself might be the best idea, depending on how quickly it can absorb then dissipate the heat through the righlith. The side of the moon doesn’t matter as there isn’t an actual ‘dark side’ of the moon, just a side we can’t see do to tidal locking. That side still gets the same amount of sun.
So bigger heatsink on the far side of the moon?
Bigger heatsink would be the target, but you gotta get it up there. On moon is not a half bad idea. Bury the heatsink and use the moon itself might be the best idea, depending on how quickly it can absorb then dissipate the heat through the righlith. The side of the moon doesn’t matter as there isn’t an actual ‘dark side’ of the moon, just a side we can’t see do to tidal locking. That side still gets the same amount of sun.