metadigital Posted February 24, 2007 Posted February 24, 2007 If the universe is infinite, why is the sky mostly black? (Extra points if you can name the person whom this paradox is named after, and whom solved it.) OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
thepixiesrock Posted February 24, 2007 Posted February 24, 2007 Because it's expanding Lou Gutman, P.I.- It's like I'm not even trying anymore!http://theatomicdanger.iforumer.com/index....theatomicdangerOne billion b-balls dribbling simultaneously throughout the galaxy. One trillion b-balls being slam dunked through a hoop throughout the galaxy. I can feel every single b-ball that has ever existed at my fingertips. I can feel their collective knowledge channeling through my viens. Every jumpshot, every rebound and three-pointer, every layup, dunk, and free throw. I am there.
Musopticon? Posted February 24, 2007 Posted February 24, 2007 Why is the colour of infinity blue? kirottu said: I was raised by polar bears. I had to fight against blood thirsty wolves and rabid penguins to get my food. Those who were too weak to survive were sent to Sweden. It has made me the man I am today. A man who craves furry hentai. So let us go and embrace the rustling smells of unseen worlds
Tale Posted February 24, 2007 Posted February 24, 2007 (edited) Olber's Paradox (named after Heinrich Wilhelm Olbers) Finite age of the universe This explanation of the paradox points to the finite speed at which light travels through space. As we look further out in space we see further back in history; eventually we would pass beyond the finite age of the universe. A similar explanation was first offered, ironically, by poet and writer Edgar Allan Poe in his prose poem Eureka Redshift While the finite age of the universe deals with the contribution of stars to the brightness of the night sky, it leads to the question of why the Big Bang itself does not visibly contribute instead. The reason is that the radiation from the Big Bang has been redshifted to microwave wavelengths as a result of the cosmic expansion, and forms the cosmic microwave background radiation. The expansion of the universe also limits the size of the observable universe, which means that light beyond this does not reach us, which creates the optical effect of living in a finite universe (see finite age argument). http://en.wikipedia.org/wiki/Olbers'_paradox Edited February 24, 2007 by Tale "Show me a man who "plays fair" and I'll show you a very talented cheater."
metadigital Posted February 25, 2007 Author Posted February 25, 2007 Yes. Though you lose points for not explaining it in a sentence. The answer I was looking for is: "Because the universe isn't infinitely old, dummy." OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
Dark Moth Posted February 25, 2007 Posted February 25, 2007 If the universe is infinite, why is the sky mostly black? (Extra points if you can name the person whom this paradox is named after, and whom solved it.) Because the universe isn't infinitely old, dummy.
metadigital Posted February 25, 2007 Author Posted February 25, 2007 *cookie* OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
Dark_Raven Posted February 25, 2007 Posted February 25, 2007 (edited) The Big Crunch Edited February 25, 2007 by Dark_Raven Hades was the life of the party. RIP You'll be missed.
metadigital Posted February 25, 2007 Author Posted February 25, 2007 What don't you understand, Bok? If the universe is infinite, then there should be stars in every direction (distance is irrelevant, except to work out time, but we'll get to that later). If there are stars in every direction, then there should be light in every direction. Right? The only reason that there isn't light in every direction is that the universe isn't old enough: in an infinite amount of time, the sky will be white with light because there WILL be stars in every direction. OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
Bokishi Posted February 25, 2007 Posted February 25, 2007 Ok I see. However I read that the Universe will collapse on itself in some trillion trillion more years. Current 3DMark
metadigital Posted February 25, 2007 Author Posted February 25, 2007 Unless it suffers a cold death (expands too fast for gravity to pull it all back into another crunch). And we still don't know if Dark Matter and Dark Energy really DO make up 75% of the mass of the universe. OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
alanschu Posted February 25, 2007 Posted February 25, 2007 You all are lucky I was not on earlier! I loved my Astronomy class.
Bokishi Posted February 25, 2007 Posted February 25, 2007 Uh oh Alan gonna school us all with his star-logic! Current 3DMark
astr0creep Posted February 25, 2007 Posted February 25, 2007 Wow. Ok. As an analogy, I usually compare the universe to a fire cracker. Big Bang=Original exposion Stars=Exploding debris from original explosion Planets=Debris from stars. Meh http://entertainmentandbeyond.blogspot.com/
Arkan Posted February 25, 2007 Posted February 25, 2007 Unless it suffers a cold death (expands too fast for gravity to pull it all back into another crunch). And we still don't know if Dark Matter and Dark Energy really DO make up 75% of the mass of the universe. I'm no scientist, but nearly everything observeable is cyclical in nature. I can't imagine why the universe itself would be different. "Of course the people don't want war. But after all, it's the leaders of the country who determine the policy, and it's always a simple matter to drag the people along whether it's a democracy, a fascist dictatorship, or a parliament, or a communist dictatorship. Voice or no voice, the people can always be brought to the bidding of the leaders. That is easy. All you have to do is tell them they are being attacked, and denounce the pacifists for lack of patriotism, and exposing the country to greater danger." - Herman Goering at the Nuremberg trials "I have also been slowly coming to the realisation that knowledge and happiness are not necessarily coincident, and quite often mutually exclusive" - meta
metadigital Posted February 26, 2007 Author Posted February 26, 2007 That's the burden we carry for a symbolic brain: we see patterns everywhere, even when they aren't there ... OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
Gorgon Posted February 26, 2007 Posted February 26, 2007 I though the universe had reached it's full expansion and was starting to slowly shrink again. Na na na na na na ... greg358 from Darksouls 3 PVP is a CHEATER. That is all.
metadigital Posted February 26, 2007 Author Posted February 26, 2007 No. It's actually speeding up (that's one of the reasons why they had to invent "dark energy". OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
alanschu Posted February 26, 2007 Posted February 26, 2007 (edited) I though the universe had reached it's full expansion and was starting to slowly shrink again. Nope. Too much redshift on the farthest galaxies. We can look forward to the Andromeda galaxy colliding with ours though! Edited February 26, 2007 by alanschu
Fenghuang Posted February 26, 2007 Posted February 26, 2007 Dark Matter/Energy are just Albert Einstein admitting he isn't God after all. RIP
taks Posted February 26, 2007 Posted February 26, 2007 That's the burden we carry for a symbolic brain: we see patterns everywhere, even when they aren't there ... a phenomenon known as pareidolia. taks comrade taks... just because.
metadigital Posted February 26, 2007 Author Posted February 26, 2007 I thought it was called religion ... " OBSCVRVM PER OBSCVRIVS ET IGNOTVM PER IGNOTIVS OPVS ARTIFICEM PROBAT
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