Show I r J w On Dc December 27 21 1571 Johann Kepler ono one of or the worlds world's greatest astronomers was born at berg Germany As p. p child he was sickly f but exceedingly cx- cx precocious At tho the age c o of 17 11 7 he received his bachelors bachelor's degree from rom th time the University of ot Though ho knew little of ot the subject sub sub- Kepler was unwillingly mado made madoo to o accept the tho class In astronomy at Graz na In li-I. li Forced Into this branch of learning learn- learn InS InS' ng ho made the best of oC It lIe He be beCame became be- be came me imperial mathematician ln and astrologer and made mado tho the tanco ance of such scientists as Galileo and nd Brahe Kepler's chief title to fame famo Is IsIs his Is discovery of ot tho the three laws of ot planetary motion Other important features of ot his work were in regard to o gravitation and the explanation ot of f the thc tides by lunar attraction In 1629 ho he called the attention of oC astronomers to tho the approaching transits of ot Mercury and Venus Venuto That hat of or Mercury which occurred on November r 7 7 1631 was as tho the first transit of a n planet across th the sun sunver I ever ver ob observed red Kepler dl did 1 pioneer work ork on several important scion scion- title flo subjects sUbject An English scientist has bias suggested sag sag- geste ested 1 that street treet lamp posts be bo mado made hollow to serve C as vents for forga forga ga as loading from mains and sew sew- sewers ers rs to lessen the danger cr of ot Ions in cities clUes |