Telescopic Appearances of Donati's Comet, as seen from the Cambridge Observatory, Sept 25... 1858. Creator: Unknown

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Telescopic Appearances of Donati's Comet, as seen from the Cambridge Observatory, Sept 25... 1858. Creator: Unknown

Telescopic Appearances of Donati's Comet, as seen from the Cambridge Observatory, Sept. 25, 7.30p.m, 1858. As it but seldom happens that such a favourable opportunity occurs for examining the changes which take place in the head and nucleus of a large comet approaching to and receding from the sun as in the magnificent object which has just disappeared from sight, a few particulars respecting those may not be misplaced in the columns of the Illustrated London News...On Sept. 25...the luminous sector had become greatly expanded, and was completely merged into the head, which was now much broader. The nucleus on this occasion had a bright planetary disc, and appeared to show a phase as if half-full'. From "Illustrated London News", 1858

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Comet Donati Giovanni Giovanni Donati Night Sky

EDITORS COMMENTS
This image captures the telescopic appearances of Donati's Comet, as observed from the Cambridge Observatory on September 25, 1858. The exact creator of this engraving remains unknown, but it was published in the Illustrated London News. The comet, named after its discoverer, Giovanni Donati, was a spectacular sight in the night sky during this time. The image reveals the comet's remarkable transformation as it approached the sun. On this particular night, the luminous sector, which is the bright outer edge of the coma or the glowing envelope of gas and dust surrounding the nucleus, had expanded significantly and merged into the head of the comet. The nucleus itself had taken on a bright, planetary disc shape, exhibiting a phase resembling that of a half-full planet. Such observations of a comet's head and nucleus are rare, as they provide valuable insights into the comet's behavior as it approaches and recedes from the sun. The Illustrated London News, a popular Victorian-era newspaper, recognized the significance of this event and shared this image with its readers, allowing them to witness the wonders of the universe from the comfort of their homes. This monochrome engraving is a testament to the scientific curiosity and advancements of the 19th century, showcasing the remarkable ability to document and share the discoveries of natural phenomena through the press.

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