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Post by mia on Mar 1, 2007 9:23:39 GMT
Sorry to be a bit silly(what's new) but as the building work is still going on at my house, yesterday I took pity on two poor builders who are rebuilding my path and brought them into the house and made them tea! (Bear with me, there is a point) They spotted the two scopes and the star chart on the kitchen wall and started asking questions, I pointed out the difference in stars, supergiants, white dwarfs etc and the difference in colours and how to find Betelgeuse (and not the film) Then I tried to explain the vastness of our galaxy and how ours is one of many, and how the Andromeda galaxy is visible with the naked eye and nearly overlaps with our own galaxy and how our solar system is a tiny part of our galaxy blah de blah They looked really interested but they may have been faking just to be polite and I may have bored them silly but one of them, Jim, (who has promised to check out the website) asked me a question which stopped me in my tracks and after I stopped laughing I said I would ask you as I know nothing about it, so I'll put it to all you knowledgeable people and wait for it...(it made me smile)...... If you go walk into a black hole, is it true you meet yourself walking out the other side? Answers on a postcard to Jim the builder c/o Mia's house! (Okay, I'll get me coat!!!)
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Post by eamonnpkeyes on Mar 1, 2007 11:20:02 GMT
Possibly, but then, you'd be unlikely to know, as you'd exist only as a stream of pulverised ions or sub-atomic particles, and would merely have the recognition capabilities of Stevie at Killylane on a dark night.
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Post by stevie on Mar 1, 2007 14:30:41 GMT
It's called Spaghettification
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Post by eamonnpkeyes on Mar 1, 2007 16:37:27 GMT
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Post by markdj on Mar 1, 2007 17:32:06 GMT
Doesn't time speed up as you approach the event horizon?
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Post by eamonnpkeyes on Mar 1, 2007 18:55:43 GMT
I don't know...however, time speeds up as you get older. A year now only takes about six weeks to pass, for me. If it gets any worse, I'll be dead by last Thursday.
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Post by mia on Mar 1, 2007 22:51:01 GMT
It's called Spaghettification Are you taking the mick? (nearly wrote something else there!) Don't make fun of me!! No more Maltesers for you!!
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Post by stevie on Mar 1, 2007 23:12:24 GMT
Mia, dear child, how could you doubt me so? Try Wikipedia. And after reading that, repeat over and over to yourself "Stevie is actually a raspberry ruffles man" There, thats better isn't it? Actually, recent thinking now seems to suggest that, rather than being drawn into a black hole, it is more likely that an object would be spun off again at a very large rate of knots. Think of a roulette wheel, when the ball is thrown onto it, only imagine the wheel is spinning very fast, like a centrifuge or a spinning top. There was an article in one of the recent astronomy magazines which discussed this idea.
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Post by mia on Mar 1, 2007 23:16:42 GMT
;D Duly noted!!
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Post by Veronica on Mar 2, 2007 11:17:45 GMT
While we're on the topic of Black Holes, do we know what the other side of one looks like? I think Black Holes may have fratured on the Simpsons once, but I don't recall them mentioning the other side. Thanks Mia for going in front of me, and helping to shield my ignorance from the masters.
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Post by mia on Mar 2, 2007 12:40:50 GMT
Masters??? Who are they then? Okay, I admit Stevie's one but who else? I've no qualms re showing my ignorance! If I did, I'd never leave the house! And The Simpsons definitely have an astronomy fan somehere on their team of 900 writers, I recall an episode where Lisa was campaigning against light pollution as she couldn't use her scope!
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Post by stevie on Mar 2, 2007 14:11:52 GMT
No Captain Pugwash jokes please.
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Post by Veronica on Mar 2, 2007 15:05:50 GMT
Well, I didn't say what they were Masters off, did I? A few subjects spring to mind....like dodging the question while revealing that you're an old duffer who remembers Master Wotsisname and Seaman Somethingorother. Guess I'll just use my precious teabreak and google or wiki it...I can almost sound like I know what I'm doing on this computer
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Post by mia on Mar 2, 2007 15:34:26 GMT
No Captain Pugwash jokes please. I can assure you,oh learned one, I was passing judgement on your superior knowledge and nothing else! (I love this quote thingy, makes me look as if I know what I'm doing too!!!)
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Post by kryss on Mar 2, 2007 20:56:53 GMT
As you fall into a black hole, because the gravitational force is so strong your feet (if you fall feet first) are pulled more strongly than your head hence the spagetti effect. The time dilation effect works from a combination of your speed - which ends up being a substantial fraction of the speed of light. This means that from your perspective the surrounding universe slows down and it takes forever to fall in. While being stretched etc. How ever from the perpective of the observer in the universe its all over in a flash as at the closer you go the faster you go so, with all the other stuff falling in fast you get heated by friction and everntually vaporised.
If you imagine space is a springy sheet of elastic, planets etc put a small dimple due to their mass - you can then imagine satellites orbiting the depression created in the surface (which is really 4 dimensional). The mass in a black hole is so concentrated that you can imaging it breaking through - and people theorise that , if the universe folds back on itself, the funnel can link back into the universe where all the stuff falling in would come out - hence a white hole.
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