Ptolemy and Copernicus were astronomers who had proposed theories about the solar system. Ptolemy believed that the planets and the sun orbited Earth. Copernicus believed that Earth and other planets circled a stationary sun. Which of these statements best explains why Ptolemy and Copernicus made different observations about the solar system?
They studied outdated theories and evidences.
They had different backgrounds and interests.
They used incorrect methods of experimentation.
They made errors in their scientific calculations.