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What did Tycho Brahe question about Ptolemy’s astronomical observations?
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Ptolemy
Ptolemy's theory of the solar system.
Tycho Brahe questioned the veracity of Ptolemy as an observer, casting doubt on the authenticity of his work. Specifically, Brahe pointed out that the solar observations Ptolemy claimed to have made in 141 CE were not genuine. Furthermore, Brahe raised strong arguments against the claim that Ptolemy had independently observed the more than 1,000 stars listed in his star catalog.1