[naikrovek]

we can (and do) radiate heat into space already. there's a specific infrared wavelength that passes out of our atmosphere unimpeded.

building things which receive sunlight but which emit IR at this wavelength would have a cooling effect, though I don't know to what scale.

no need to pump anything up to space, lol. just put hot stuff inside vessels which are painted with a material which radiates heat at this specific wavelength.

[AstralStorm]

Uh, paint doesn't radiate heat not does it convert IR frequencies. (except for very unusual, usually fluorescent materials) It reflects incident IR.

[naikrovek]

not normal paint, no.

thanks for nitpicking; always appreciated