![]() New Astronomy: Astronomia nova (Heidelberg, 1609) Chapter 19, 113 - 14, KGW 3 177 - 78. Now, because they could not be disregarded, these eight minutes alone will lead us along a path to the reform of the whole of Astronomy, and they are the matter for a great part of this work. For if I thought the eight minutes in longitude were unimportant, I could make a sufficient correction (by bisecting the eccentricity ) to the hypothesis found in Chapter 16. ![]() This is the path I shall, in my own way, strike out in what follows. So let us work upon it so as to at last track down the real form of celestial motions (these arguments giving support to our belief that the assumptions are incorrect ). To us, on whom Divine benevolence has bestowed the most diligent of observers, Tycho Brahe, from whose observations this eight-minute error of Ptolemy's in regard to Mars is deduced, it is fitting that we accept with grateful minds this gift from God, and both acknowledge and build upon it. ![]() For Ptolemy set out that he actually did not get below ten minutes, that is a sixth of a degree, in making observations. And from this such small difference of eight minutes it is clear why Ptolemy, since he was working with bisection, accepted a fixed equant point. Hukum Kepler Seorang ilmuwan yang bernama Johannes Kepler menemukan hukum yang mengatur pergerakan Bumi mengelilingi matahari, khususnya yang menyangkut perubahan jarak Bumi ke matahari.
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