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: Relativity Of Event Horizon

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Alexander on February 23, 2001 21:12:00 UTC

Hold on. Size of event horizon (EH)IS different for different observers. For infinite observer it is 2M, but when you come closer some part of gravitational field of black hole (BH) is outside you and thus you'll see smaller than 2M horizon.

Imagine, for example, the following. You see no photons from under EH, because they lose their energy (color) as they claim from gravitational well. They become more and more red but still visible as they ascend. Only at infinity they finally lose it all and become invisible. So, if you come closer, you will see them but being reddish. Thus, you will see photons originated slightly beyond (under) EH - to the new distance from which gravitational red shift is infinite. Thus, you will see SMALLER event horizon from the vicinity to BH than from the infinity. And the closer you come, the deeper into BH the visible EH goes.

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 1994-2018 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