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  2. Copernican heliocentrism - Wikipedia

    en.wikipedia.org/wiki/Copernican_heliocentrism

    In addition, Copernicus's theory provided a strikingly simple explanation for the apparent retrograde motions of the planets—namely as parallactic displacements resulting from the Earth's motion around the Sun—an important consideration in Johannes Kepler's conviction that the theory was substantially correct. [53]

  3. De revolutionibus orbium coelestium - Wikipedia

    en.wikipedia.org/wiki/De_revolutionibus_orbium...

    Very soon, nevertheless, Copernicus' theory was attacked with Scripture and with the common Aristotelian proofs. In 1549, Melanchthon, Luther's principal lieutenant, wrote against Copernicus, pointing to the theory's apparent conflict with Scripture and advocating that "severe measures" be taken to restrain the impiety of Copernicans. [26]

  4. Copernican Revolution - Wikipedia

    en.wikipedia.org/wiki/Copernican_Revolution

    Nicolaus Copernicus's heliocentric model. Copernicus studied at Bologna University during 1496–1501, where he became the assistant of Domenico Maria Novara da Ferrara.He is known to have studied the Epitome in Almagestum Ptolemei by Peuerbach and Regiomontanus (printed in Venice in 1496) and to have performed observations of lunar motions on 9 March 1497.

  5. Commentariolus - Wikipedia

    en.wikipedia.org/wiki/Commentariolus

    The Commentariolus (Little Commentary) is Nicolaus Copernicus's brief outline of an early version of his revolutionary heliocentric theory of the universe. [1] After further long development of his theory, Copernicus published the mature version in 1543 in his landmark work, De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres).

  6. Narratio Prima - Wikipedia

    en.wikipedia.org/wiki/Narratio_Prima

    It is an introduction to Copernicus's major work, De revolutionibus orbium coelestium, published in 1543, largely due to Rheticus's instigation. Narratio Prima is the first printed publication of Copernicus's theory.

  7. Kepler's laws of planetary motion - Wikipedia

    en.wikipedia.org/wiki/Kepler's_laws_of_planetary...

    In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler in 1609 (except the third law, and was fully published in 1619), describe the orbits of planets around the Sun. These laws replaced circular orbits and epicycles in the heliocentric theory of Nicolaus Copernicus with elliptical orbits and explained how planetary ...

  8. Deferent and epicycle - Wikipedia

    en.wikipedia.org/wiki/Deferent_and_epicycle

    Epicyclic theory, in part, sought to explain this behavior. The inferior planets were always observed to be near the Sun, appearing only shortly before sunrise or shortly after sunset. Their apparent retrograde motion occurs during the transition between evening star into morning star, as they pass between the Earth and the Sun.

  9. Letter to the Grand Duchess Christina - Wikipedia

    en.wikipedia.org/wiki/Letter_to_the_Grand...

    Moreover, his letter misses out on key facts that include the Church's non-attacking stance on Copernicus when the canon proposed his heliocentric model. A Dominican theologian Tolosani made an unpublished attack on the Copernican system as early as 1544. Furthermore, the tone of the letter was combative and overly proud.