Black Hole links

Martin · July 22, 2005

today somebody was asking basic BH questions in another thread

I know there are a bunch of good educational links about BH but I couldnt immediately provide them.

If you have some good BH links please post them there, so this can be a BH reference library

I know that Univ. colorado Andy Hamilton website has some excellent animations of falling into a BH and some java applets generating orbits around BH at various distances.

Recently I ran into timelapse movie of actual astronomical observation of stars orbiting a BH, IIRC it was the one at our galaxy's center, roughly 2 or 3 million solar masses.

there are a bunch of good links to BH facts and movies which would be nice to keep track of.

please contribute if you've got something that might be useful especially for novices with general interest in the subject

Martin · July 22, 2005

http://www.mpe.mpg.de/ir/GC/images/movie2003.mpg

timelapse photography of several stars doing

various-shaped orbits around the three-million-solar-mass hole at

the center of our Milky Way Galaxy

the higher-resolution version (which takes longer to download) is here:

http://www.mpe.mpg.de/ir/GC/index.php

this was already in the Astronomy links thread, post #50

http://scienceforums.net/forums/showpost.php?p=94886&postcount=50

RATS! THESE LINKS DONT WORK ANY MORE! we have lost those movies.

WHEW! here is a similar movie to the one where the links aren't working

http://www.astro.ucla.edu/~jlu/gc/pictures/orbitsMovie.shtml'>http://www.astro.ucla.edu/~jlu/gc/pictures/orbitsMovie.shtml

http://www.astro.ucla.edu/~jlu/gc/

the difference is this one is more an animated diagram, and the other movie was more realistic looking because composed of timelapse IR images of the actual field of stars as they move around the hole

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Gary, earlier today, asked about the diameter of a BH

somebody shd give a link discussing the usual formula for the

radius of the event horizon of a vanilla generic BH

2GM/c²

so diameter of event horizon is 4GM/c²

(and technically that is the circumf of the event horiz divided by pi)

and that means 6 kilometers diameter for a solar mass hole and proportionally larger for more massive

I don't have a link to some basic facts about BH page. Can anybody supply?

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Here is Andy Hamiltons's nice stuff

http://casa.colorado.edu/~ajsh/schw.shtml

(movies here!)

More by Andy, about Schwarzschild geometry

http://casa.colorado.edu/~ajsh/schwp.html

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HERE IS TED BUNN'S BLACK HOLE FAQ

http://cosmology.berkeley.edu/Education/BHfaq.html

I have a high opinion of Ted Bunn, but this FAQ is aimed at very general audience and is kind of non-technical. I'd like it better if it had more formulas

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EDIT just saw the following post by Spyman. thanks!

good to have the Wiki BH link. I see it has links to other BH resources on web