Definition:Neptune/Historical Note

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Historical Note on Neptune

Neptune was predicted independently by John Couch Adams and Urbain Le Verrier by a process of mathematical investigation of discrepancies in the orbit of Uranus between $1843$ and $1846$.

It was first observed and recognised for what it was by Johann Gottfried Galle on $23$rd September $1846$, within a degree of where it was predicted to be.