Back to Home

Blackholes2 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 II | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Event Horizon The Size Of Our Universe

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by nåte on March 19, 1999 03:36:55 UTC

: : : Black holes with an event horizon the size of our universe : : : would have a low density within the event horizon and thus : : : we could be living in a giant black hole. If the space time : : : event horizon is in expansion from the big bang but with : : : a residual massive black hole equating the event horizon : : : computation equal to the size of the universe; the universe : : : would appear as it does to us today. : : : Comments

: : Well, for starters I would mention a few things...

: : First, I don't perceive that the cosmos we are currently inhabiting possess the qualities of the inside of a EH. : The assumptions I made above could lead to a universe similar to ours.

: : The idea of an EH is such that it is merely a boundary where spacetime is infalling at a velocity infinitely close to 'c'. : : In all actuality, the "space" beyond the EH is nothingness. There is no dimensional characteristics beyond an EH; hence there is no spacetime continuum. : There are more schools of thought about what lies on the other side of the boundary (read some of Jean-Peierre Luminet ideas - a French black hole specialist). : A black hole requires the existence of a regions of space-time outside the hole to which nothing inside can escape.

: Also John Gribbins from Cambridge claims we could be living in a giant black hole and not even notice. : The density of a spherical black hole is approx = (3c^6)/(32*pi(G^3)*M^2) by combining equations for the : density of a sphere with the Schwarzschild radius. This density is very very low for an estimated mass >= to : our universe.

Could you clarify your position a bit more? I'm interested in what you have to say, just not clear exactly what you are proposing.

thanks

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 1994-2019 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