Question

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Kepler and Newton studied the movement of planets. Kepler studied the speed of the planets while Newton studied the forces that kept the planets in place. Which of these statements best explains why the two scientists proposed different theories about the planets?

They had different goals.
They studied different models.
They used different sets of data.
They misinterpreted their findings.

Answer 1

They had different goals

Step-by-step explanation:

From reading the question, it tells us that Kepler was studying the speed of the planets, but Newton was studying the forces of the planets. So, they were studying and assessing two different things, and thus had different goals :)

Answer 2

They had different goals.

Step-by-step explanation:

Although they focused their studies on astronomy and the factors that compose it, we can see from reading the above question that Kepler and Newton had different purposes in their studies (Newton even used many of Kepler's notes to take as a basis for their theories). As we can see, Keple's goal is to understand how fast the planets moved and what factors resulted and influenced that speed. On the other hand, Newton's goal was to know how the planets would not get out of their places, even moving at high speeds.