Image of the Day · 2026-09-06

Turning Away From the Sun

Turning away from the sun: a Mercury radiator farm yawing edge-on rank by rank as dawn crosses it, its night of stored heat still glowing off the last ranks while the first already frost over.

An artistic imagining, not real hardware. A frost plain on Mercury at dawn, with half of the risen sun cresting a scarp through a gap in the ranks of a vast waste-heat radiator farm. The nearest fins stand turned edge-on to the light as dark frost-rimed blades, the middle ranks are caught mid-turn, and the far ranks glow warm orange at their roots while their tips have gone dark. One fin still faces the sun and blazes, standing beside a low machine hall with a small service crawler and one worklamp at its base, and a short run of header pipe burns bright where the blazing fin's heat pours through. Thin frost smoke drifts low over the ground. No text or insignia appears. — An artistic imagining, not real hardware: a waste-heat radiator farm on Mercury at dawn, its fins turning edge-on to the rising sun rank by rank as the last of the night's heat leaves through them. Mercury's solar day runs about 176 Earth days, so one night lasts roughly 88 Earth days and the unlit surface falls to about 100 K, which is why the farm works hardest in the dark and turns away the moment the light returns; no such farm exists. Image: poweringspace.com. Artistic imagining.