Back to Home

Blackholes Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Blackholes I | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Re: Re: Re: Fantastic Geometry

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Bruce on November 20, 2000 21:40:49 UTC

Silverana-I noticed there was an oversight in answering your question "i just gotta get this piece of information confirmed ... is the geodesic for earth our equator? " The principle of extremal aging (from General Relativity) summarizes the result that a free particle follows a geodesic, a worldline of extemal aging. Principle of extremal aging: The path that a free particle takes between two events in spacetime is the path for which the time lapse between these events, recorded on its wristwatch, is an extremum. This path is a path in which the free particle follows its natural motion (free fall, no force acting upon the free particle to change its path) in the gravitational field (curved spacetime). It is the straight line through curved spacetime. Deimos mentioned the Riemann geometry which is the geometry Einstein used for his theory of gravity, General Relativity.

Follow Ups:

    Login to Post
    Additional Information
    Google
     
    Web www.astronomy.net
    DayNightLine
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2021 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