Message boards :
Science (non-SETI) :
Black Holes part 2
Message board moderation
Previous · 1 . . . 25 · 26 · 27 · 28 · 29 · 30 · 31 . . . 35 · Next
Author | Message |
---|---|
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Janne it would be very helpful to all of us if you could make it clear what are you own words and what you have cut and pasted from other web sites. So I will attempt to rewrite one of your recent posts for you to make it clear to others. What? Do you Think I'm a Nobel laureate? My Words means nothing. Your Words are frankly silly! I have no idea of the level you guys have in education. I give links to where science know today so you can figure it out yourself. High school diploma is not enough to understand Universe models and particle physics. Confusing particle physics with Universe models? No. You do! |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
@Chris S. Quiz Time. Who said this? "If I could explain it to the average person, it wouldn't have been worth the Nobel prize." |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
My thoughts are that the energies we cannot perceive might come from the Man Himself. (God) Of course, this is just an assumption and not useful at all for the atheists among us. Cosmic essence (quintessence) is leaping to mind again.. Cosmic essence? But thats even more complicated than dark energy theories. And if it's emitted from man himself a very low energy. |
Julie Send message Joined: 28 Oct 09 Posts: 34054 Credit: 18,883,157 RAC: 18 |
My thoughts are that the energies we cannot perceive might come from the Man Himself. (God) Of course, this is just an assumption and not useful at all for the atheists among us. Cosmic essence (quintessence) is leaping to mind again.. I found a nice definition of Cosmic essence: (in ancient and medieval philosophy) the fifth essence or element, ether, supposed to be the constituent matter of the heavenly bodies, the others being air, fire, earth, and water. rOZZ Music Pictures |
Julie Send message Joined: 28 Oct 09 Posts: 34054 Credit: 18,883,157 RAC: 18 |
@Chris S. Dark energy would be composed of anti-gravitons, opposing the elusive gravitons, hence the cosmological constant. The field of quantum gravity should be studied more often in my opinion. rOZZ Music Pictures |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
My thoughts are that the energies we cannot perceive might come from the Man Himself. (God) Of course, this is just an assumption and not useful at all for the atheists among us. Cosmic essence (quintessence) is leaping to mind again.. Ether:) Einstein call it space-time fabric. If you warp it you can make dark holes. Perhaps even wormholes. Yes the Greek philosophers was right. There are no such thing as empty space in our universe:) https://en.wikipedia.org/wiki/Nothing |
Julie Send message Joined: 28 Oct 09 Posts: 34054 Credit: 18,883,157 RAC: 18 |
My thoughts are that the energies we cannot perceive might come from the Man Himself. (God) Of course, this is just an assumption and not useful at all for the atheists among us. Cosmic essence (quintessence) is leaping to mind again.. He did? So I was right after all in my lettre to Dr. Hawking! The Special Relativity theory combined with Newton's Luminiferous aether (for instance) would give us more insight in this (not yet refuted) concept. From Wikipedia: James Clerk Maxwell said of the aether, "In several parts of this treatise an attempt has been made to explain electromagnetic phenomena by means of mechanical action transmitted from one body to another by means of a medium occupying the space between them. The undulatory theory of light also assumes the existence of a medium. We have now to show that the properties of the electromagnetic medium are identical with those of the luminiferous medium." Best is to concentrate on the basic thinkers, in my opinion. What I wonder is if the above would also shed more light on dark energy.. rOZZ Music Pictures |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Dark energy would be composed of anti-gravitons, opposing the elusive gravitons, hence the cosmological constant. Dark energy doesn't have anti-gravity properties. Gravity is a force. It however makes the universe (space-time fabric) to expand. The Casimir effect shows that vaccum is not nothing and that the effect is propagated in something. Plates with area 1 square centimetre placed 0.1 millimetre apart would feel a force equivalent to the weight of 10 raised to 16 grammes. https://en.wikipedia.org/wiki/Casimir_effect Horror Vacui. |
Julie Send message Joined: 28 Oct 09 Posts: 34054 Credit: 18,883,157 RAC: 18 |
Dark energy would be composed of anti-gravitons, opposing the elusive gravitons, hence the cosmological constant. How do you know that Janne? What about the cosmological constant? The main attraction of the cosmological constant term is that it significantly improves the agreement between theory and observation. The most spectacular example of this is the recent effort to measure how much the expansion of the universe has changed in the last few billion years. Generically, the gravitational pull exerted by the matter in the universe slows the expansion imparted by the Big Bang. Very recently it has become practical for astronomers to observe very bright rare stars called supernova in an effort to measure how much the universal expansion has slowed over the last few billion years. Surprisingly, the results of these observations indicate that the universal expansion is speeding up, or accelerating! While these results should be considered preliminary, they raise the possibility that the universe contains a bizarre form of matter or energy that is, in effect, gravitationally repulsive. The cosmological constant is an example of this type of energy. Much work remains to elucidate this mystery! Source: http://map.gsfc.nasa.gov/universe/uni_accel.html Oddly enough, dark energy — for all the surprise around its discovery — is not an entirely new concept in physics. There is historical background for this idea, and it comes from the preeminent astronomer of the 20th century, Albert Einstein. Source: http://hubblesite.org/hubble_discoveries/dark_energy/de-did_einstein_predict.php What I think is the (hypothetical) anti-graviton is at the basis of the accelerated expansion of our universe and quite a few theories state the same on dark energy as well. https://dougvanvenrooij.wordpress.com/2013/03/15/anti-gravitons-may-explain-dark-matter-dark-energy-and-the-universe-we-observe-today-2/ rOZZ Music Pictures |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
How do you know that Janne? Simple answer. I don't:) I don't even understand what energy is. Does anybody? We know that energy and mass are interchangeable. But they where created in a finite numbers. How can the force of dark energy increase and make the universe expansion accelerating? Anti-gravitons are also force carriers and when they meet a graviton they become "pure" energy. There are not so much anti-matter in our universe anymore. |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Make your mind up ... Hmm. I suggest that you should read your own link. It doesn't explain what energy is, only how it's behave. In science it's called Thermodynamics. Zeroth law of thermodynamics: If two systems are in thermal equilibrium respectively with a third system, they must be in thermal equilibrium with each other. This law helps define the notion of temperature. There is no description of what energy is. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
The Michelson-Morley experiment (1887) has shown that aether does not exist. The Michelson-Morley interferometer used common light. Now the same experiment is made with laser light to detect gravitational waves. Tullio |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
The Michelson-Morley experiment (1887) has shown that aether does not exist. The Michelson-Morley interferometer used common light. Now the same experiment is made with laser light to detect gravitational waves. It looks like semantics to me. Einstein To deny the aether is ultimately to assign that empty space has no physical qualities whatever. You can measure empty space with a ruler and a watch. https://en.wikipedia.org/wiki/Luminiferous_aether#Einstein.27s_views_on_the_aether |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
Empty space is not empty. According to Heisenberg, you can have the creation of a particle-antiparticle doublet which lasts a very short time. This is described by the quantum theory of fields, that Einstein ignored. Tullio |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Empty space is not empty. According to Heisenberg, you can have the creation of a particle-antiparticle doublet which lasts a very short time. This is described by the quantum theory of fields, that Einstein ignored. Virtual particles are no longer a theory. It's a fact demonstrated with the Casimir effect. I don't think that Einstein ignored anything. And for instance he didn't know that the universe expansion accelerates. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
Carlo Rovelli, an Italian physicist working in Marseille on quantum loop gravity, made a list of Einstein's mistakes and the way he always corrected them. I have read Abraham Pais's biography of Einstein "Subtle is the Lord" and I agree with Rovelli. Tullio |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
The key insight of quantum physics is that some quantities in nature come in multiples of discrete values, called quanta. This principle has successfully been applied to all of physics, except for gravity. This is the motivation for the search for quantum gravity. http://www.dummies.com/how-to/content/string-theory-and-loop-quantum-gravity.html Now also some scientists are proposing that time come in quantas. What have time to do with gravity? Well one thing is if time stands still gravity don't propagate. But Black holes are propagating gravity. This is very strange. |
Julie Send message Joined: 28 Oct 09 Posts: 34054 Credit: 18,883,157 RAC: 18 |
Empty space is not empty. According to Heisenberg, you can have the creation of a particle-antiparticle doublet which lasts a very short time. This is described by the quantum theory of fields, that Einstein ignored. I was pondering over how for instance the anti-graviton and graviton on a Planck scale do not annihilate when they interact whereas anti-matter and matter do annihilate instantaneously. This puts the safety of CERN in a whole new perspective in my opinion. rOZZ Music Pictures |
Julie Send message Joined: 28 Oct 09 Posts: 34054 Credit: 18,883,157 RAC: 18 |
We know that energy and mass are interchangeable. The (hypothetical) tachyons would have the ability to travel faster than the speed of light. They are the (hypothetical) keystone to quantum entanglement. The next point to make is that while photons do not have mass, they do have momentum, and a change in momentum yields a force, so in actual fact light is able to physically interact with matter Photons are transferors of light. What I wonder about is if they would possess energy of their own to be able to create or rather gain momentum. rOZZ Music Pictures |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
I believe there is too much imagination in concepts such as tachyons. Physicists should remember what Isaac Newton said: "Hypotheses non fingo". Tullio |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.