Nasa Announces Dark Matter Discovery
http://www.nasa.gov/home/hqnews/2006/aug/ HQ_M06128_dark_matter.html
"Astronomers who used NASA's Chandra X-ray Observatory will host a media teleconference at 1 p.m. EDT Monday, Aug. 21, to announce how dark and normal matter have been forced apart in an extraordinarily energetic collision."
Press conference is Monday.
"Astronomers who used NASA's Chandra X-ray Observatory will host a media teleconference at 1 p.m. EDT Monday, Aug. 21, to announce how dark and normal matter have been forced apart in an extraordinarily energetic collision."
Press conference is Monday.
Posted by Loduwijk on Wednesday, August 16, 2006 08:41AM
- 54 comments
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#54 Elation:
Actually, the government of Scientopia has endorsed relativity since forever so shut up!!!
Tuesday, October 17, 2006 07:50PM
#53 Jp:
No, it's not proven. You can't prove anything, I'm afraid. Ironically, Descartes proved it. ;)
We're pretty bloody certain that relativity holds up, because we haven't found many situations where it doesn't (Well, it doesn't explain quantum stuff all that well, but quantum stuff doesn't explain things like galaxies all that well, so it's alright). One of the results of relativity is that it's impossible to go faster then the speed of light IF you have mass and IF your velocity is currently lower then that of light, because it takes an infinite amount of energy to do so (Thanks to mass dilation). HOWEVER, there are some exceptions. First off, if you don't have mass, you can certainly go at c. Secondly, if you start off above the speed of light, for whatever reason, the barrier gets flipped - you can't go any SLOWER then light. That's more a theoretical possibility then anything, but it's a well-known physical fact - look up 'tachyons'.
Ryo, you seem to be misunderstanding 'theory'. Describing something as a 'theory', in the scientific sense, is like calling it a gold-medal-winning athlete. Theories are the pinnacle of scientific research. They tie together multiple lines of evidence in a testable, coherent explanation, and have survived the firestorm of scientific testing. Theories are BIG, man.
And before someone mentions 'laws', they're different entities - laws are mathematical relations (F=dP/dt), theories are explanations (Space bends).
Black holes ARE a region of space. When you get something contracting past it's Schwarzchild radius, it is dense enough that it essentially makes an 'infinite' dent in the universe. It shrinks to a point mass, and pushes a bloody great hole in the 3D rubber sheet that is space-time. Outside the schwarzchild radius of that object, all is as it was, it has the same gravitational pull as it did before. Inside it, you're screwed because curvature of space means that even light can't get out. It's the curvature of space that is the black hole, not the object, which by now has shrunk to an infintesmal singularity.
We know that normal laws of physics and maths apply inside a black hole because they're exactly as those laws describe them. Relativity says objects like this should exist and have these properties, and lo and behold, they do! We can't describe the singularity, as of yet, because it has infinite density and sort of screws over all the formulas, but relativity ain't perfect. We'll get to it eventually.
Finally, hawking radiation is NOT stuff 'escaping' from a black hole. It's virtual particles appearing right on the border of the hole, so that one gets sucked in before it can annihiliate the other. Please, please, please have a basic understanding of quantum AND relativity before talking about this sort of stuff, because it's quite strange, counter-intuitive, and complex.
As for conspiricies, you don't quite understand what I'm talking about. There's a difference between 'conspiricy theory' and 'conspiricy'. Conspiricy theories are normally nutty allegations that the government is in league with the homosexuals/the communists/the devil/the aliens/the hippies/the Jews/the lizardpeople/whatever. Conspiricies are where a group of people collaborate in doing something, normally something underhanded. Also, scientists are NOT the government. Governments don't say that the speed of light is absolute, scientists do. See the difference?
Tuesday, October 17, 2006 07:29PM
#52 Flame500:
dude einstein or somebody proved it i dont remember exactly what they did but it was something like shining a flashlight out a train window.
Tuesday, October 17, 2006 02:10PM
#51 Ryokashi:
Where is the proof? There are THEORIES. That is all.
Sunday, October 15, 2006 07:03PM
#50 Elation:
How and when?
Sunday, October 15, 2006 06:22PM
#49 Flame500:
Ryokashi wrote:
> Flame, STOP REVIVING OLD POSTS!
>
> And it hasn't been proven impossible for anything to travel faster then light.
it has been proven impossible
and why should i not comment on the post that he made just becuase it wasnt yesterday or something dosent mean i cant post about it so shut up and stop talking in caps idiot.
Sunday, October 15, 2006 06:21PM
(Edited on Tuesday, October 17, 2006 02:18PM)
#48 Vexonater:
Whoa.
Listen. Regardless of the impossibilities of US moving through the universe faster than light, there's nothing to stop us from warping the universe around us so we get BY faster than light.
Sunday, October 15, 2006 06:08PM
#47 Popisfizzy:
Flame500 wrote:
> holy crap you guys responded fast + i didnt use wikipedia or my schools science text book.
Obviously.
Sunday, October 15, 2006 06:02PM
#46 Flame500:
holy crap you guys responded fast + i didnt use wikipedia or my schools science text book.
Sunday, October 15, 2006 05:57PM
#45 Elation:
What article? =p I mentioned wikipedia as a joke to point out that Flame is basically just quoting out of his school's science textbook.
Now I had to explain my bad joke. :(
Sunday, October 15, 2006 05:56PM
#44 Popisfizzy:
Elly, I've read that article and it isn't that innacurate. =/
Sunday, October 15, 2006 05:54PM
#43 Elation:
Watch out, Flame500 has the wikipedia article on blackholes AND HE ISN'T AFRAID TO USE IT
P.S. Jp knows more than you flame
Flame said:
> how do you know that our government dosent do the same?
don't associate us with you :(
Sunday, October 15, 2006 05:50PM
#42 Thorg:
welcome to the noncapitalletterzone
Sunday, October 15, 2006 05:49PM
#41 Ryokashi:
Flame, STOP REVIVING OLD POSTS!
And it hasn't been proven impossible for anything to travel faster then light.
Sunday, October 15, 2006 05:47PM
#40 Flame500:
Jp wrote:
> a bunch of stuff i think would be disrespectfull to make people read again
but basicly jp your a bit off
a black hole isnt a "region in space" it is an object in space its a star that has gone supernova and collapsed in on itself becuase there was so much matter that it pulled the outer ring inwards increasing the density causeing the outter parts to be collapsed inward yet again.
a black hole is not that big black spot thats its intense gravitational feild called the point of no return where absolutly nothing will return untill the blackhole dies (which will happen roughly about the same time the universe does becuase all black holes will eventually consume the universe and become one giant black hole(this isnt just one theory it is the theory(unless your going with religion)))
things do escape from a black hole the people who say nothing does simply dont want to go into the whole huge argument of telling you what does but basicly black holes decay particle by particle (and by particles i mean subatomic particles)
it has been proven impossible for anything to travel faster then light
jp on that note about conspiracy terrorists what do you mean by that becuase there are conspiracys all around the world in governments in communist nations they change textbooks from the facts to things they want the people to believe how do you know that our government dosent do the same? i bet youll say they dont but wouldnt someone in one of those nations say the same thing?
although you seem to know alot on this subject you dont know enough to say that math doesnt fall apart inside of a black hole. one becuase nothing could even do math inside of a black hole. two becuase it appears alot of things do fall apart inside of black holes it stops time inside of the point of no return and slows time outside of it. how do you even know that the laws of physics dont completly stop inside of it?
if someone knows more on the subject or i got something wrong please say so.
P.S. gits i think you mean black hole not dark hole and white holes havent been proven to even exist they are only theoretical and black holes arent like a box their more like a vacum that gets stronger the more that is sucked up
Sunday, October 15, 2006 05:45PM
#39 Gakumerasara:
Well according to The Black Hole (http://en.wikipedia.org/wiki/The_Black_Hole) it's a gateway to Heaven/Hell. But more importantly, who can forget Parliament/George Clinton/Funkadelic's masterpiece: "Theme from the Black Hole"?
'Said my name is the One
Some people call me the Funk
Here's a toast to the boogie!
Said my name is the One
Some people call me the Funk, oh!
I'll toast to that!
And when I find a vacant booty
I move right in on the rump, ooh!
I'm like a camel!
Humpin' to please!
I'm up to my hump in funk, yeah
Here's a toast to the boogie!
Damn you Starchild! *shakes fist* >:o
Sunday, September 24, 2006 09:40PM
#38 Solbadguy500:
JP YOU'RE STUPID YOU DON'T KNOW ANYTHING NOW I'M GOING TO LEAVE THIS ARGUMENT.
Thursday, August 17, 2006 01:27AM
#37 GITS-Motoko:
Mmm. Talking to you is pointless. I withdraw.
Wednesday, August 16, 2006 10:42PM
#36 Jp:
Of course you can trust the definition of a word when it's a scientific definition. If someone else has a different definition, it is WRONG. I mean, otherwise you start arguing about the definition of "point charge" or "2" or something and it just gets stupid. I can claim that you can't trust the definition of 2=3-1 'till the cows come home, doesn't make it the least bit rational.
Wednesday, August 16, 2006 10:20PM
#35 Dark_Shadow_Ninja:
Jp, I think Vex was being sarcastic. Poking fun at the fact that everything shows you can't possible leave a black hole. Which is why he is saying the laws of mathematics no longer apply.
Wednesday, August 16, 2006 10:16PM