Compare ptolemy’s and copernicus models of the universe

"Sun-centered," or "heliocentric" Copernicus thought that the planets orbited the Sun, and that the Moon orbited Earth. The Sun, in the center of the universe, did not move, nor did the stars. ... Also, both Copernicus and Ptolemy thought the orbits of the planets were circular, but we now know they are elliptical.

B.a pop up at ion changes in response to a change in the environment.

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.