Johannes Franz Hartmann

German astronomer (1865–1936).

Born January 11th, 1865 in Erfurt.

Died September 13th, 1936 at 71 years old in Göttingen.

Occupations
astronomer, physicist, university teacher

It is the secret of the world that all things subsist and do not die, but retire a little from sight and afterwards return again. Ralph Waldo Emerson