Page 29 - GALIET PHYSICS BLOSSOMS I+
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2.c. As Jupiter’s epicyclical journey begins around the deferent, an imaginary line of sight is drawn from the equant to Jupiter’s position relative to the stars. At this point in
the
figure below, Jupiter is farthest away from the Earth, hence Jupiter’s brilliance seems dimmer.
2.d. As Jupiter goes on moving around its epicycle around the deferent, the equant line of sight goes on moving relative to the fixed stars.
2.e. When Jupiter and Earth are closely aligned as seen below, Jupiter is seen as brightest because it is closest to Earth. At this point, its “real” westward or retrograde motion
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