1. Twenty years later, a lecture on the Copernican system was given in Rome to the pope, who approved.

2. Galileo's new mechanics enabled the Copernican system to be defended against some of the objections to it mentioned above.

3. Like Galileo, he was committed to the Copernican system as a cosmology and not merely as a mathematical hypothesis.

4. Next he learns about the Copernican system, and after that he moves on to geometry, and then to chronology.

5. Although his work was instrumental in bringing the Copernican system into prominence, Galileo was far more than just an astronomer.

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6. The real advantage of the Copernican system is that the mathematics is much simpler in the frame of reference in which the sun is at rest.

7. And moving to a Copernican system was a great threat to this kind of sacred geography, uh, which was tacitly accepted but wasn't really honestly part of scripture.

8. An initial reluctance on the part of Galileo to publicize the Copernican system should not automatically be ascribed to fear of clerical censure.

9. The commissary general in charge of the prosecution, Firenzuola, apparently admitted that he did not consider the Copernican system unacceptable.

10. Meanwhile that one Catholic entertained the hope that his freedom to defend the Copernican system might yet be restored.

11. But in a world in which, according to Vermij, the Tychonic system was regarded as a serious rival of the Copernican system, Marius's conclusions seem reasonable.