The title page of Kepler’s “Astronomia Nova” (1609), in which he advanced his first two laws. (Courtesy of Jay M. Pasachoff)

Published October 19, 2015 at 333 × 500 in Historical Documents

The title page of Kepler’s “Astronomia Nova” (1609),
in which he advanced his first two laws.
(Courtesy of Jay M. Pasachoff)