Black Holes

[ccyy1993]

What is a black hole?

[Clanad]

An oversimplified expanation of an as of yet unobserved phenomena, is that a black hole is the results of a large star that has collapsed at the end of its life.  The collapsing generates so much gravitiy that nothing, including light can escape.  This super-gravity (my term) "sucks" everything close enough into the black hole.  Theories abound as to what happens to the things sucked into the black hole... but that's a subject for another question...

[Thunderchild]

we they guy/girl must really be as blind as a bat and probably want a fast answer to a homework question. there is a detail explanation on the answerbank home page: http://www.theanswerbank.co.uk/Article3471.html a better explanation than that i never have read

(with no offence of course) 

[Thunderchild]

well the guy/girl must really be as blind as a bat and probably wants a fast answer to a homework question. there is a detail explanation on the answerbank home page: http://www.theanswerbank.co.uk/Article3471.html a better explanation than that i never have read

(with no offence of course) 

[bruce5755]

Basically I am beginning to believe that they are if fact un-provable theories put about by astromoners and physicists to give jobs for the boys!  Its like Quantum mechanics, what a load of twaddle!  What a job eh! paid thousands upon thousands of pounds to find things that can never be proved!!!  And then lo and behold some other scientist comes up with another theory that changes what was thought before and they all rub their hands together and think here we go again for the next few decades.

I challenge them all to my theory (which, I may add has cost the tax payer nothing) the Universe is in fact no more than a big sink in which we are no more than just a speck of bacteria floating in the depths of someones dirty washing up water.  It will all end when we go down the plug hole!  (Hang on a minute, hole! black? perhaps I've missed something).

GO ON PROVE ME WRONG!!!!!!!

[Loosehead]

Well gravitational collapse is accepted throughout the scientific world and reletively easy to prove mathematically. Known as the Chandrasakar limit, the size that a star needs to be to collapse to a black hole, ie the amount of matter that needs to be present for gravity to overcome all the resistant forces and to crush to a singularity, is well know. Given the number of stars available, then it is certain that some of them have collapsed into black holes. The cygnus X system for example is widely accepted as having a black hole where a star should be.  

[bruce5755]

Loosehead!  Are you by any chance a scientist, cos I think you've almost proved my point!

[jake-the-peg]

Look black holes are not "unobserved" they may not be directly observed but neither are a whole host of things - you don' t observe Oxygen but you'd soon observe the effect if it wasn't there and we observe the effect that black holes have - the first was confirmed in by the Canadian Astronomer Tom Bolton in 1973.

As for Bruce all I can say is that black holes are another thing that got far too much attention from the sci-fi boys and documentry makers in search of excitement.

You rather miss the point in your example - nobody has to prove you wrong - the principal of Occams razor states that you have to prove we are being washed down a plug hole.

If by any chance you actually are interested in how we know things and how scientific method works you should look up Karl Popper on your favorite search engine - that should give you a far more sophisticated arsenal to attack scientists with.

[Thunderchild]

shut up bruce and go to your local library if you have no decent books at home. ur uttering a lot of twaddle

[bruce5755]

Lighten up guys!