A National Look at the Use of Congregate Care in Child Welfare. congregate care.
The idea of a spherical Earth appeared in Greek philosophy with Pythagoras (6th century BC), although most pre-Socratics (6th â 5th century BC) retained the flat Earth model. Aristotle provided evidence for the spherical shape of the Earth on empirical grounds by around 330 BC.
Nicolaus Copernicus (1473â1543) was a mathematician and astronomer who proposed that the sun was stationary in the center of the universe and the earth revolved around it.opernicus claimed that Werner erred in his calculation of time and his belief that before Ptolemy the movement of the fixed stars was uniform, but Copernicus's letter did not refer to his cosmological ideas.