MacTutor
18th September
On this day in 1846, Le Verrier wrote to Johann Galle at the Berlin Observatory asking him to look for a planet at the position he predicted. Galle located Neptune five days later.
See THIS LINK.
On this day in 2013 Google released a Foucault doodle.
See THIS LINK.
On this day in 2013 Google released a Foucault doodle.