johannes kepler, astronomer vintage portrait

kepler astronomical german astronomer famous astronomers telescope johannes face science scientist asteroid astrology astronomy sketch old portrait drawing vintage engraving engraved tycho brahe solar system fiery trigon supernova icons thomas browne newton law universal gravitation laws planetary motion scientific revolution mathematician astrologer natural philosopher key figure 17th-century books astronomia nova harmonice mundi epitome astronomiae copernicanae works one foundations newton's theory