How the plate is made

Every day NASA publishes one photograph. This page reprints it as a halftone: the image is sampled onto a grid, and each cell is pushed to the nearest available tone by an ordered dither — the same threshold matrix newspapers used to print photographs with nothing but ink and paper. Depth sets how many tones the plate is allowed. At two, you are looking at pure black and white. At sixteen, the photograph reassembles.

Nothing here is decoration. Four live feeds set the printing conditions, one feed to one condition:

Photograph

NASA’s Astronomy Picture of the Day is the plate itself. A new one every morning.

Solar flares

Activity from NASA’s DONKI database crushes the tone range. An angry sun forces the plate toward one bit.

Temperature

Charleston’s current temperature sets the ink colour, cold blue through warm rust.

Cloud cover

Overcast lifts the blacks and flattens contrast, the way an overcast sky does to everything under it.

Wind

Wind speed drifts the threshold matrix across the plate, so the grain crawls.

Near-Earth objects

The closest asteroid passing today sends a pressure wave through the field. Closer approach, deeper swell.

Data: NASA APOD, NeoWs, DONKI · Open-Meteo
Built by Wayne Intelligence