. On this day in 1877 – May 31st – French astronomer Gabrielle Renaudot Flammarion was born in Meudon in the département of Hauts-de-Seine.
Gabrielle, the second wife of the prominent astronomer Camille Flammarion, was General Secretary of the Société Astronomique de France. She worked with her husband at his observatory at Juvisy-sur-Orge, France from where she carried out observations of planets, minor planets and variable stars. Gabrielle Flammarion published work on several topics including the Great Red Spot on Jupiter and the surface features of Mars. .
. On this day in 1858 – June 2nd – Italian astronomer Giovanni Battista Donati first observed the comet that bears his name.
Comet Donati, formally designated C/1858 L1 and 1858 VI, was one of the most brilliant comets of the 19th century. It inspired artists and poets and was also the first comet to be photographed, though the photograph has been lost. .
. On this day in 1819 – June 5th – British mathematician and astronomer John Couch Adams was born in Laneast, Cornwall.
His most famous achievement was predicting the existence and position of Neptune, using mathematics. But Urbain LeVerrier had independently made the calculations and the planet was discovered using LeVerrier's calculations. (Who discovered Neptune?). .
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