Who Discovered Sun = Center of Solar System? - Physics Forums
2007年5月3日 · Copernicus himself still believed the solar system to be the centre of the universe, a view that is quite obviously due to the pre-existing doctrine that existed at the time. Over time, we began to "peel away" layers of the church view that did not fit in with observation - firstly the solar system, then the stars, the galaxy and then the ...
Who was the first person to recognize the stars as very distant suns?
2022年11月28日 · But you didn't have to know the solar distance to speculate that the stars were more distant suns. A sun-centered solar system is helpful. Did Copernicus speculate on this? Did Galileo suggest this? A sun centered solar system was contrary to the Church teaching at the time. I would think that there are thousands of suns would be equally ...
Ptolemaic Model of the Solar System - Physics Forums
2020年2月18日 · The Ptolemaic Model of the Solar System is an ancient geocentric model that was developed by the Greek astronomer Ptolemy in the 2nd century AD. It states that the Earth is at the center of the universe and all other celestial bodies, including the Sun, revolve around it …
Why the Sun Doesn't Move: Debunking Common Misconceptions …
2010年11月24日 · In summary, the sun appears to remain stationary in a sun-centered coordinate system, but it actually has multiple motions including rotation within the galaxy and a wobbling caused by the orbits of planets. These motions are not significant enough to significantly affect the overall position of the sun over millions of years.
How Long is the Moon's Heliocentric Path and Its Mean Speed?
2010年8月17日 · How was the heliocentric model of the solar system proven? Galileo's observations using a telescope provided evidence for heliocentric motion. He observed the phases of Venus, the moons of Jupiter, and the changing positions of the stars, all of which supported the idea of a Sun-centered solar system.
Why is there a difference between the composition of planets and …
2019年11月8日 · 1) The solar system is mostly hygrogen and helium, plus some heavier elements. 2) The Sun is the expected mixture of these. 3) The rest of the solar system was the same mixture. 4) Once the Sun got to a critical size it …
Feynman's New Zealand lecture, Inca astronomy, rule and reason.
2013年8月7日 · We don't have, as Feynman points out, much recorded Inca history so it is possible they contemplated a sun centered solar system with planets, moons, and other stuff orbiting the sun and may have even come up with Newton's law of gravitation, big ifs).
What is the true description of motion? - Physics Forums
2004年6月22日 · Imagine two bodies moving together through space; one body (the larger) moves in a more or less straight line, but the smaller body moves in a sort of zig-zag pattern weaving in and out of the larger bodies path. The distance separating the two masses remains more or less constant. how would...
Are heliocentrism and geocentrism both correct? - Physics Forums
2018年4月23日 · (In other words, the center of mass of the solar system is near the center of the Sun.) The Earth and Moon are much closer to being a binary planet ; the center of mass around which they both rotate is still inside the Earth, but is about 4,624 km (2,873 mi) or 72.6% of the Earth's radius away from the centre of the Earth (thus closer to the ...
Galaxies recede faster than light - Physics Forums
2005年9月21日 · This is my first post on this message board. So if this message does not represent itself the way I am trying to express it, I apologize in advance. Based on an article in Scientific American March 2005 addition, it stated that galaxies recede faster than light. "The recession of a galaxy...