Word: copernicus
(lookup in dictionary)
(lookup stats)
Dates: during 1893-1893
Sort By: most recent first
(reverse)
...move independent as it were, the perturbations being almost imperceptible. The ancients had a general idea of the attraction of the heavenly bodies. Their speculations about the orbils were not correct. With the revival of learning in the middle ages came a renewed attention to the investigation of astronomy. Copernicus, Tycho and Kepler were the foremost students. Copernicus renewed the rejected idea that the sun was the centre of the system of planets. Tycho, a rich nobleman in Denmark, established the first observatory. Kepler investigated he careful observations and deduced the fact that the planets moved in ellipses; he established...