



Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place... The Space and Astronomy Agora 
I'll Try
Forum List  Follow Ups  Post Message  Back to Thread Topics  In Response To Posted by Bruce on March 22, 2001 21:30:50 UTC 
In relativity an objects natural motion is described by Newton's first law of motion. This is called a geodesic. For the gravitiational field this is a straight line through curved spacetime. This is an objects natural motion and is also referred to as free fall. There is no force of gravity in GR. For a freely falling object there are three constants of the motion. Energy per unit mass E/m, momentum per unit mass p/m (in SR) and angular momentum per unit mass L/m. The Schwarzchild metric was the first solution to Einstein's equations. Even though this metric is written for describing spacetime around spherically symmetric nonrotating bodies of mass it is still a very good approximation for slowly spinning objects such as the Sun and planets of our solar system. From the Schwarzchild metric these constants of motion are derived


Additional Information 

About Astronomy Net  Advertise on Astronomy Net  Contact & Comments  Privacy Policy 
Unless otherwise specified, web site content Copyright 19942024 John Huggins All Rights Reserved Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" are trademarks of John Huggins 