Question

Ptolemy believed that Earth was at the center of the universe. Kepler believed that the sun was at the focus of Earth's elliptical orbit. Which of these statements best explains why Ptolemy and Kepler made different observations about the solar system?

The focus of their study was different.

They studied outdated theories and evidences.

They could not match the data with the observations.

They believed in proposing different theories to strengthen science.

Answer 1

Ptolemy proposed Geocentrism (Earth is the centre)

Kepler used Tycho's work to conclude Kepler's Laws
1. The orbit of the Earth is elliptic.
2. Line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time.
3. Squares of the Periods of two planets is equal to the ratio of the cubes of their average distances from the sun \[\frac{P ^{3} }{ d ^{2} }\]

That means, Kepler believed in Heliocentrism (Sun is the centre) but the idea of Heliocentrism had been introduced by Copernicus, long before Kepler and Tycho's work. So, unlike Ptolemy, Kepler was not trying to propose the model of solar system

i think the options should not be "they" cus Kepler did nothing wrong