Power in space · Generation, transmission, storage, use · Government and first-party sources
poweringspace
Image of the Day · 2026-04-25

The Bank of Cold

Cold is the currency: the bright face is the vault, the dark face is the town, and the difference between them is the money.

An artistic imagining, not real hardware. A dark, banded picture in magenta, violet and pale ice blue, built as horizontal layers with the ground cut away so the buried part is visible. One saturated magenta stripe runs from the top of the frame straight down the left side, turns along the bottom, and forms the power feed. On the horizon sits a long, low industrial block with five pale capped cylinders standing across its face and a rank of narrow finned stacks rising above it, flushed dull rose at their roots. A pale cyan pipe runs the full width of the picture just below the horizon and drops narrow risers into seven buried spherical vessels of very different sizes, each glowing cold and each showing a different bright fill line across it, the leftmost and rightmost cut off by the frame. The ground itself is two toned: pale lit ice on the left, near black on the right, meeting on a hard vertical edge, with three dull rose pipes lying on the dark side. A second magenta line leaves the block to the right on short pylons and ends at a small dark structure with a row of warm orange windows. A dim ringed planet is cropped by the top right corner. Everything except the machinery is continuous graded colour. Nothing shown exists.
An artistic imagining, rendered procedurally, of a cryogenic energy bank on Iapetus: surplus power comes down the bright stripe at left, is spent chilling seven vessels buried under the moon's icy bright hemisphere, and is drawn back later out of the gap between that banked cold and the sun warmed dark hemisphere on the right. Iapetus really does have two faces of very different brightness and temperature, and cryogenic storage that banks energy as cold is a real technology on Earth, but no plant of this kind has been built or planned anywhere off it. Image: poweringspace.com. Artistic imagining.
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