The precession of the Earth’s orbital axis, with a period of about 26000 years, slowly changes the position of…
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	Orbital Characteristics of a Two-Moon System Orbiting a Planet
I think that you can derive the information you are looking for by noting that: (1) Since the moons…
 
	How to Calculate the Orbital Period of the Sun Around the Center of our Galaxy
I believe that this question has been addressed in a previous answer to a question about the Orbital Period…
 
	What Would Happen to the Earth if the Moon Disappeared?
This question has been answered very thoroughly on Astronomy.com. As the Moon stabilizes the Earth’s axial tilt and drives…
 
	Newtonian and General Relativistic Theory of Gravitation
In fact, both the Newtonian and General Relativistic (due to Einstein) theories of gravitation are correct on large scales. …
 
	What Would Cause the Orbit of a Planet to Change?
I believe that the only way to significantly change the orbit of a planet is to have it interact…
 
						