NorthAyrshireKillie Posted July 16, 2013 Share Posted July 16, 2013 Did this teacher have a beard and leather elbow patches on his jacket? How did you know? 0 Quote Link to comment Share on other sites More sharing options...
Confidemus Posted July 16, 2013 Author Share Posted July 16, 2013 How did you know? Cos that's the default attire of the happy clapper teacher! 0 Quote Link to comment Share on other sites More sharing options...
NorthAyrshireKillie Posted July 16, 2013 Share Posted July 16, 2013 Cos that's the default attire of the happy clapper teacher! That is true, I think they must of had a meeting or something 0 Quote Link to comment Share on other sites More sharing options...
Hedgecutter Posted July 16, 2013 Share Posted July 16, 2013 Question: Everyone bangs on about how life needs water to exist. What's to stop liquid methanol or whatever being the equivalent to another form of life? 0 Quote Link to comment Share on other sites More sharing options...
Hedgecutter Posted July 16, 2013 Share Posted July 16, 2013 But, but , but my teacher told me it was 2000 years old ~4500 million years really. Those silly Americans don't know what a billion is. 0 Quote Link to comment Share on other sites More sharing options...
grumswall Posted July 16, 2013 Share Posted July 16, 2013 Question: Everyone bangs on about how life needs water to exist. What's to stop liquid methanol or whatever being the equivalent to another form of life? nothing its just that we have evidence of how life can evolve with water so its a good place to start when looking for life elsewhere. 0 Quote Link to comment Share on other sites More sharing options...
FlyerTon Posted July 16, 2013 Share Posted July 16, 2013 Helmet leak halts ISS spacewalk: http://www.bbc.co.uk/news/science-environment-23334709 0 Quote Link to comment Share on other sites More sharing options...
NorthAyrshireKillie Posted July 16, 2013 Share Posted July 16, 2013 Helmet leak halts ISS spacewalk: http://www.bbc.co.uk/news/science-environment-23334709 I'm sure that's an STD. 0 Quote Link to comment Share on other sites More sharing options...
Confidemus Posted July 16, 2013 Author Share Posted July 16, 2013 I'm sure that's an STD. A Space Trek Disease. 0 Quote Link to comment Share on other sites More sharing options...
NorthernLights Posted July 22, 2013 Share Posted July 22, 2013 Cassini took a picture of Earth on Friday... 0 Quote Link to comment Share on other sites More sharing options...
Raidernation Posted July 23, 2013 Share Posted July 23, 2013 That is fantastic 0 Quote Link to comment Share on other sites More sharing options...
Confidemus Posted July 23, 2013 Author Share Posted July 23, 2013 Beautiful. Well played, sir. 0 Quote Link to comment Share on other sites More sharing options...
Todders Posted July 23, 2013 Share Posted July 23, 2013 One thing that always confuses me is that scientists claim that there is no "centre" of the universe. Surely if all galaxies are moving away from each other then then there must be a vector between them. Trace each of these vectors back and they must converge somewhere. 0 Quote Link to comment Share on other sites More sharing options...
~~~ Posted July 23, 2013 Share Posted July 23, 2013 That picture is breathtaking 0 Quote Link to comment Share on other sites More sharing options...
Confidemus Posted July 23, 2013 Author Share Posted July 23, 2013 One thing that always confuses me is that scientists claim that there is no "centre" of the universe. Surely if all galaxies are moving away from each other then then there must be a vector between them. Trace each of these vectors back and they must converge somewhere. The main point here is that the big bang wasn't an expansion IN space. It was an expansion OF space. Nothing existed before it, so the big bang happened "everywhere". To each individual observer, everything is moving away from them relative to where they are at any given moment in time. So there's no "centre", as it were. 0 Quote Link to comment Share on other sites More sharing options...
Ric Posted July 23, 2013 Share Posted July 23, 2013 Here is a bit of trivia for people, the geographical area of Russia is actually larger than the surface of Pluto. 0 Quote Link to comment Share on other sites More sharing options...
DA Baracus Posted July 23, 2013 Share Posted July 23, 2013 Here is a bit of trivia for people, the geographical area of Russia is actually larger than the surface of Pluto. Whilst the land area that covers the Russian Federation is indeed fucking huge, that's a pretty cool stat. 0 Quote Link to comment Share on other sites More sharing options...
Todders Posted July 24, 2013 Share Posted July 24, 2013 The main point here is that the big bang wasn't an expansion IN space. It was an expansion OF space. Nothing existed before it, so the big bang happened "everywhere". To each individual observer, everything is moving away from them relative to where they are at any given moment in time. So there's no "centre", as it were. It still makes no sense though. To be travelling away from something then there must be a vector between you and the "something". Reverse that vector and everything is travelling towards everything else. If that's the case then everything MUST converge at some point. 0 Quote Link to comment Share on other sites More sharing options...
energyzone Posted July 24, 2013 Share Posted July 24, 2013 I still don't get the expansion into nothing theory. If space didn't exist before the Big Bang then what did? 0 Quote Link to comment Share on other sites More sharing options...
renton Posted July 24, 2013 Share Posted July 24, 2013 (edited) It still makes no sense though. To be travelling away from something then there must be a vector between you and the "something". Reverse that vector and everything is travelling towards everything else. If that's the case then everything MUST converge at some point. Using what as a reference point? A lot of galaxies are moving away from us, some towards (we are going to crash into Andromeda in a few billion years) The mistake is in thinking of it as an empty 3 dimensional grid, the centre of which is the point of the big bang, and the universe subseuqently expanding and filling the grid. In fact the grid framework is the universe and the big bang was the entirety of that grid. Edited July 24, 2013 by renton 0 Quote Link to comment Share on other sites More sharing options...
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