Johann Gottfried Galle
Johann Gottfried Galle (9 June 1812 in Radis, Saxony-Anhalt–10 July 1910 in Potsdam, Brandenburg) was a German astronomer at the Berlin Observatory who, with the help of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune, and know what he was looking at. He used the calculations of Urbain Le Verrier to know where to look.
This short article about a person or group of people can be made longer. You can help Wikipedia by adding to it.