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Updated: May 28, 2025
After being lost for 300 years, this drawing was recovered by the prolonged efforts of Mr. When Wells's comet, in 1882, approached very close indeed to the sun, the spectrum changed to a mono-chromatic yellow colour, due to sodium. For a full account of the wonders of the cometary world the reader is referred to books on descriptive astronomy, or to monographs on comets.
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