Kepler's first law worked, where Copernicus' original heliocentric model failed, because Kepler described the orbits as elliptical, not circular.

Here's a step-by-step explanation:

1. Copernicus' model: Copernicus proposed a heliocentric model, which means he believed that the Sun was at the center of the universe and all the planets, including Earth, revolved around it in perfect circles. However, this model couldn't accurately predict the positions of planets because the orbits of planets are not perfect circles.

2. Kepler's model: Kepler, on the other hand, proposed that planets move in elliptical orbits with the Sun at one of the two foci. This is known as Kepler's First Law or the Law of Ellipses.

3. Why Kepler's model worked: The elliptical orbit model provided a much more accurate prediction of the planets' positions. This is because the actual paths of the planets around the Sun are indeed elliptical, not circular.

So, the correct answer is "elliptical, not circular."

Question

Kepler's first law worked, where Copernicus' original heliocentric model failed, because Kepler described the orbits as elliptical, not circular.

Here's a step-by-step explanation:

1. Copernicus' model: Copernicus proposed a heliocentric model, which means he believed that the Sun was at the center of the universe and all the planets, including Earth, revolved around it in perfect circles. However, this model couldn't accurately predict the positions of planets because the orbits of planets are not perfect circles.

2. Kepler's model: Kepler, on the other hand, proposed that planets move in elliptical orbits with the Sun at one of the two foci. This is known as Kepler's First Law or the Law of Ellipses.

3. Why Kepler's model worked: The elliptical orbit model provided a much more accurate prediction of the planets' positions. This is because the actual paths of the planets around the Sun are indeed elliptical, not circular.

So, the correct answer is "elliptical, not circular."

Knowee AI · Accepted Answer

Kepler's first law worked, where Copernicus' original heliocentric model failed, because Kepler described the orbits as elliptical, not circular.

Here's a step-by-step explanation:

1. Copernicus' model: Copernicus proposed a heliocentric model, which means he believed that the Sun was at the center of the universe and all the planets, including Earth, revolved around it in perfect circles. However, this model couldn't accurately predict the positions of planets because the orbits of planets are not perfect circles.

2. Kepler's model: Kepler, on the other hand, proposed that planets move in elliptical orbits with the Sun at one of the two foci. This is known as Kepler's First Law or the Law of Ellipses.

3. Why Kepler's model worked: The elliptical orbit model provided a much more accurate prediction of the planets' positions. This is because the actual paths of the planets around the Sun are indeed elliptical, not circular.

So, the correct answer is "elliptical, not circular."

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