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…appear to move, are replete with a fluid composed of air. This viewpoint, he contends, encounters fewer drawbacks compared to opposing arguments and stands as the most straightforward explanation, capable of elucidating various aspects such as celestial motions, distances, appearances, comet trajectories, altitudes, the birth of new stars, and the entire…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/IterII/IterExI_Appendix.php