Skip to comments.Satellite could open door on extra dimension (Universe is floating!? Black holes in Solar System!?)
Posted on 05/31/2006 7:35:22 AM PDT by Wiz
An exotic theory, which attempts to unify the laws of physics by proposing the existence of an extra fourth spatial dimension, could be tested using a satellite to be launched in 2007.
Such theories are notoriously difficult to test. But a new study suggests that such hidden dimensions could give rise to thousands of mini-black holes within our own solar system and the theory could be tested within Plutos orbit in just a few years.
Black holes of various masses are thought to have sprung into existence within 1 second of the big bang, as elementary particles clumped together at extreme energies. But Einstein's theory of general relativity predicts the smallest of these "primordial" black holes should have already evaporated, through a quantum process called Hawking radiation.
But according to some alternative theories that attempt to unify gravity with quantum mechanics, such as string theory, small black holes could still exist. That is because these theories propose extra spatial dimensions, which alter the way gravity behaves on small scales. The theory of general relativity holds that there are three spatial dimensions plus time.
"That [extra spatial dimension] changes the rate at which black holes radiate, so you can slow down the evaporation quite substantially," says Charles Keeton, a physicist at Rutgers University in New Jersey, US.
Floating universe Now, Keeton and colleague Arlie Petters at Duke University in North Carolina, US, have calculated how many of these tiny black holes should exist and how they might be detected according to an offshoot of string theory.
The theory they use, called the Randall-Sundrum braneworld model, proposes that the 3D universe we live in is floating within a larger universe with an extra spatial dimension.
(Excerpt) Read more at newscientistspace.com ...
Plumbers have known this for centuries...........S#!7 floats.....
If gravity behaves differently on small scales, then we're in for some rather radical technological discoveries... umm... 20 years from now.
(20 years is the magical number. It is like "tomorrow" because tomorrow is always out of reach.)
This explains where the socks go, actually.
I missed that one.
Now we can explain to our teachers at school that micro black holes ate our homework. :-D
This is making my brane hurt.
Yay, I'll be able to go home soon!
darn, that was fast....
"darn, that was fast...."
Actually it took hours. I just traveled back in time via my dryer to post quickly.
No big deal. I just did the same thing this morning with another topic.
The 'brane on the left is Hell and the one to the right is Heaven. Both a less than a millimeter away, but in a 4th dimensional direction.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.