Astronomical Synesthesia


Radio image of the Crab Nebula: an example of astronomical information that can be neither seen nor heard directly

The image to the left is a radio picture of the Crab Nebula, the debris field from a massive supernova explosion that was recorded by astronomers in 1054 AD. These data come from 11 hours of observations made by a large array of metal dishes called, uncreatively, the Very Large Array. In this image, we see the structure of the debris as it streams away from the explosion site at 1000 kilometers per second, energized by radiation and winds coming from the remnant of the long-dead star, a spinning ball of neutrons 10 km wide and more massive than our Sun.

Except, we don’t actually see anything.

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