Comment by ryandamm

Cooling in space was covered by XKCD's Randall Munroe in pretty entertaining detail here:

https://www.youtube.com/watch?v=EsUBRd1O2dU

TL;DR... cooling in space isn't passive, you're on the "inside" of an enormous vacuum flask. And radiative coupling with space is possible from the ground, if that's what you're interested in:

https://www.skycoolsystems.com

But god bless crazy entrepreneurs. Don't ask whether we can, definitely don't ask if we should, just ask whether it makes for good headlines...