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View Full Version : New youtube vid on Black holes--



John Jaksich
2010-Jun-09, 07:27 PM
I thought I would post the youtube video and the link of a fairly new vid from an author that goes by the name spacerip---it is free


Note to moderators---Please feel free to move it if need be---I don't anticipate any problems --though?
http://www.youtube.com/watch?v=D3AfNXdg2Tk


youtube link (http://www.youtube.com/watch?v=D3AfNXdg2Tk&playnext_from=TL&videos=4HIe7vNczTE&feature=bulletin)

The intended audience is general public consumption--but it looks well done.

karadan
2010-Jul-23, 01:22 PM
I love SpaceRip. It is my favourite YT channel. Thanks for posting this. You gotta love Liam Neeson's voice.

One thing which perplexed me slightly - I was always under the impression a black hole was in fact a solid sphere of infinitely dense matter. This programme eludes to the fact that it is an actual 'hole'?

HenrikOlsen
2010-Jul-23, 10:41 PM
Simplified answer:
It isn't really neither. What it is, is enough mass to bend light enough to be tangent to a "surface" a bit out from it, which means that everything happening below the "surface" is unknowable because no information gets out. It could potentially be something like totally ordinary matter, there's just no way to know.
I write "surface" because it's not an actual physical surface like the earth have, i.e. there's nothing solid there, but rather a surface in the mathematical sense of "this is the positions where space has a specific property", in this case that's where not even light gets out.