The Italian astronomer Giovanni Donati discovers Comet Donati (C/1858 L1), the first comet to be photographed.
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88 years ago, in 1819:
Jean Louis Pons is the first 'discoverer' of comet 7P/Pons–Winnecke.
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137 years ago, in 1770:
Charles Messier discovers Comet D/1770 L1, also known as Lexell's Comet after its orbit computer, Anders Lexell.
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101 years ago, in 1806:
Jose Joaquin de Ferrer (Spain), observing at Kinderhook, New York, gives the name corona to the glow of the faint outer atmosphere of the Sun seen during a total eclipse.
It's been 4003 days
