to test copernicus’s model, tycho took meticulous measurements of the positions of the planets, and he hired kepler to interpret the data. kepler found that the geocentric model did not accurately predict the planets’ positions, but neither did copernicus’s heliocentric model. he found that copernicus’s insistence that the planets’ orbits were perfectly circular was the problem. if the orbits were instead ellipses, then the heliocentric model would have been able to very accurately predict the positions of the planets. this is known as kepler’s first law of planetary motion.

Hich of the following best summarizes the text’s depiction of the ancient indus valley cities (namely harappa and mohenjo-daro)? a. the cities were very plain and simple; the people did not focus on art and architecture, devoting their time instead to agriculture and the bare essentials. b. the cities were adorned, or decorated, with almost overwhelming displays of wealth and artistic architecture. c. the cities were extremely clean, relying on an advanced water and sewer system, though this was mainly constructed for the innermost areas of the cities. d. the cities were clean and peaceful, and they were designed in an extremely organized fashion, using an advanced water and sewer system to keep them this way

What role did the waterways of europe play in development of europe's economy

What is an example of a line segment