Topic: the world is my spaceship | |
---|---|
wow
ok well I was readin about it and it has gravity ,and it is not visible ,, its got somethin to do with somethin obviously , but they mention the " big bang " , ( and of course we are all going out ward from that ) but it mentions how it might end in the " big crunch " ,,we continue going outward until the process reverses itself ( in theory ) and then we compress into the crunch ,, they figure we are still going outward um what if we are already in the reverse process and heading back inward what happens next ?? somebody please tell me.... |
|
|
|
Well looks like that dream won't come true now.
|
|
|
|
We actually can experimentally confirm that the universe is still
expanding. Modern telescopic tech is adequate to view distant universes and, through paralax, to compute the speed at which they are receeding from us. Interestingly, the speed at which distant galaxies recede is directly proportional to their distance from us. The only mathematical explanation that makes sense for this pattern (that has been offered so far) is universal expansion. Imagine a bunch of pennies taped to the surface of a balloon. As the baloon expands, the pennies are pushed farther apart. Also, due to the mathematics of curvature, pennies which are further apart experience greater curvature, and therefore move away from each other faster. With general relativity (as a refinement of special relativity) Einstein demonstrated that space can be curved, which carries on into the best understanding of both gravity and cosmic expansion yet offered. As far as dark matter goes, I must admit that I'm not up with the cutting edge. So far as I know, dark matter was first discovered because it does not emit light, but can block light. In other words, dark matter was first discovered not by direct observation but rather by the way in which it obscured distant stars. Since then there have been experiments which theoretically demonstrate (through paralax) that light is bent when passing near to dark matter, which would indeed indicate mass. I don't believe dark matter has ever yet been directly observed. The totally (?) non-emittive nature of dark matter is very interesting, since it is almost unheard of in nature. Some speculate a correlation between DM and black holes. I'd love to hear more recent news on this front if anyone has any ... Uh, yeah, maybe I should shut up for a while? |
|
|
|
Oh - and the "big crunch" is still fairly theoretical, but it goes like
this. About 25 years ago scientists were able to first predict and then experimentally verify a level of universal background radiation which would have been caused by any Big Bang event and which would not yet have had enough half-lives to dissapear completely. In fact, it was predicted and verified to an incredible degree of precision. This was when Big Bang became the default origin theory. The Big Crunch, also sometimes called Cold Death, theorizes (rather logically) that energy-based expansion cannot be an infinite reaction. Accordingly, the universe continues to expand, but not to create new matter, and thereby contains less matter for a given area all the time. This process would cause the universe to gradually lose heat and energy until the energy driving the cosmic expansion was exhausted. At this point the universe would begin to cool, which would in turn slow particle movement, which would result in condensation and, eventually, maybe, a big crunch. What happens then? Beats me. Big bang, maybe? Regardless, all life in the universe is likely to be frozen to death long previous, and our sun is going to go supernova far sooner, so I wouldn't worry about it. |
|
|
|
OH IF YOU HEAR OF A N Y NEW FININGS ON THE TOPIC I WANT TO BE THE
FIRST TO KNOW ,, I WANT TO BE THE ONE THAT FIGURES OUT WHAT THAT STUFF IS ,, I THINK IT HAS A REACTIVE NATURE YA BLACH HOLES HAVE IT I THINK SOME 90 PERCENT OF SPACE IS MADE UP OF IT OR SOMTHIN LIKE THAT , SOME WEIRD INVERTED PROCESS IN WICH MATTER IS OF A DIFFERENT STATE ... hmmm |
|
|
|
OMG (((((((((((CAT)))))))))))))) I walked into the WRONG classroom.. I
thought this was HISTORY |
|
|
|
I want to go to the moon! I just want to float
|
|
|
|
send him to Minnesota pweas
<------------------ |
|
|
|
}}}}}}}}}}ZOOOOOOOOOOOOOOOOOOOOOOOMMMMMMM{{{{{{{{{{{{{{
|
|
|
|
oh theres those crickets again ,I guess the cooler space ship was
already here and they all left without me.. |
|
|
|
(( Purple)))) Noppers sweetie yours is the coolest,,, I want
to go to Texa and Visit Ms Txs and Bucket,, or course after you and I have lunch and hang out for awhile |
|
|
|
i need to take time n read this
<<< n this is a perfect place to do it party on... |
|
|