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 rec

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.