A stunning grayscale image of Comet McNaught captured by the STEREO A spacecraft. The comet's bright coma dominates the lower portion, while its extensive dust tail stretches across a vast expanse (30 million km). A fainter, neutral iron tail, a rare discovery, is also visible. Bright Venus appears near the top left, causing a slight image artifact.

Astronomy Picture from 04/05/2007

The Iron Tail of Comet McNaught

Source: https://apod.nasa.gov/apod/ap070504.html


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