Johann Caspar Horner

At the beginning, he wanted to be a priest, but later he went to Göttingen, where he learnt astronomy.

After the journey he took two years in Saint Petersburg with the cataloging the items he had found.

He discovered a method for approaching the roots of equation with unknown factor in a higher power.

In 1805, Johann Caspar Horner visited Japan with the Prussian Georg Heinrich von Langsdorff, as a scientist to the Krusenstern mission that also brought the Russian ambassador Nikolai Rezanov to Japan.

[2][3] This followed the first flight of a hot air balloon by the brothers Montgolfier in France in 1783.