I recall a lot of "speculative-fiction" about anti-matter when it was first discovered/postulated, much of it dealing with the concepts and ideas of what-and-how "contra-terrene" ...
Quote from: RanulfC on 12/06/2011 06:07 pmI recall a lot of "speculative-fiction" about anti-matter when it was first discovered/postulated, much of it dealing with the concepts and ideas of what-and-how "contra-terrene" ... You do? That was 1928-1932. How much speculative fiction was written at the time, and were you born circa 1910? -Alex
Randy. Here. Take two of these and call me in the morning....
http://newatlas.com/dipole-repeller-void-pushing-milky-way/47648/?utm_source=Gizmag+Subscribers&utm_campaign=3a3d9a1e90-UA-2235360-4&utm_medium=email&utm_term=0_65b67362bd-3a3d9a1e90-90223594Enormous extragalactic void is pushing on the Milky Way. Astronomers have now discovered a huge extragalactic void, called the Dipole Repeller, that's pushing us away.
Assuming that antimatter generates antigravity, I think that there is some bad concepts around it. It's not that antimatter was repealed by gravity. It was that antimatter would generate a negative space curvature.So, the answers to your questions will be the same that the standard model.It will change other things. For example, photons shouldn't generate space curvature/gravity (never tested as you need a enormous quantity of photons in a small place to "weight" something).Antimatter would be generate negative curvature, so it will never form planets or stars. Most antimatter would be in intergalactic space. It would generate negative pressure on galaxies.
I think it might be possible that the dark voids are another universe where gravitational objects what pull in their space expel it out into our universe....Gravity appears to contract space into it pulling in whats around it.
Quote from: Spaniard on 04/05/2017 07:45 amAssuming that antimatter generates antigravity, I think that there is some bad concepts around it. It's not that antimatter was repealed by gravity. It was that antimatter would generate a negative space curvature.So, the answers to your questions will be the same that the standard model.It will change other things. For example, photons shouldn't generate space curvature/gravity (never tested as you need a enormous quantity of photons in a small place to "weight" something).Antimatter would be generate negative curvature, so it will never form planets or stars. Most antimatter would be in intergalactic space. It would generate negative pressure on galaxies.No, it is believed anti-matter generates normal gravity as far as I know. It also takes positive energy to make anti-matter. What I was speculating is that anti-matter is negative energy in reverse time which makes it behave like normal matter but when it comes into contact with normal matter the time and then energy cancel out inducing a wave in the vacuum which carries the effective mass elsewhere. This being why when an electron and positron annihilate their mass isn't lost. It is carried off in the light which is the result of the annihilation. The negative gravity speculation was just that, but speculating that dark matter is actually matter in a parallel dimension much like our own. In this other dimension time runs backward and most matter that exist is anti-matter. My speculation tries to answer the question - "where did all the anti-matter go?" You see when we create matter - particles we always create equal amounts of matter+anti-matter. So where did all this matter come from and where is all the anti-matter. My speculation indicates maybe it is in a parallel dimension where time is running in reverse and it is considered dark matter to our dimension where it expels space into our dimension.
The negative gravity speculation was just that, but speculating that dark matter is actually matter in a parallel dimension much like our own. In this other dimension time runs backward and most matter that exist is anti-matter. My speculation tries to answer the question - "where did all the anti-matter go?" You see when we create matter - particles we always create equal amounts of matter+anti-matter. So where did all this matter come from and where is all the anti-matter. My speculation indicates maybe it is in a parallel dimension where time is running in reverse and it is considered dark matter to our dimension where it expels space into our dimension.
I regard the runaway (or self-accelerating) motion […] so preposterous that I prefer to rule it out by supposing that inertial mass is all positive or all negative.
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Quote from: flux_capacitor on 07/12/2017 10:58 pm...Thanks flux. I had no idea they already had a working model of such a system.
But this axiom was stated before the discovery of the accelerating expansion of the universe. [8] We are even now in a "dark-energy-dominated era". Since such an acceleration implies the action of a negative pressure, and since a pressure is a density of energy (per unit of volume), this question should be reconsidered.
Quote from: flux_capacitor on 07/12/2017 10:40 pmBut this axiom was stated before the discovery of the accelerating expansion of the universe. [8] We are even now in a "dark-energy-dominated era". Since such an acceleration implies the action of a negative pressure, and since a pressure is a density of energy (per unit of volume), this question should be reconsidered.This is wrong. Pressure is not a density of energy. Energy is the T00 component of stress-energy tensor; pressure is components T11, T22 and T33. Accelerating expansion must have _positive_ energy density of vacuum (then it has negative pressure).