81–90 of 302 posts
Earlier quoted context omitted.
It is, we can't see them because they emit dark energy "light". /s
We would see gamma radiation producing events at the interaction interface, even if it is just interstellar gas occasionally colliding. Not to mention the occasional universe bleaching bursts of energy that comes from an antimatter galaxy colliding with a regular matter galaxy.
Here comes the Alcubierre Warp Drive!
> It is quite likely that the negative masses in this study are a mathematical tool, rather than real physical matter. This rules out a lot of sci-fi, which is disappointing of course!
If you put a negative mass and positive mass side by side and release from rest, they will accelerate indefinitely and break conservation of energy. Of course science should be open to any possibility, no matter how strange. But I feel the author understates its strangeness. And requiring negative mass to be continually created makes this theory not all that much "simpler" than the standard dark matter+dark energy.
If you put a negative mass and positive mass side by side and release from rest, they will accelerate indefinitely and break conservation of energy. Of course science should be open to any possibility, no matter how strange. But I feel the author understates its strangeness. And requiring negative mass to be continually created makes this theory not all that much "simpler" than the standard dark matter+dark energy.
Same with normal gravity, but backwards.
Would this be only gravitational mass that's negative or would it be both gravitational mass and inertial mass? Because negative inertial mass is zany and wierds me out. Negative gravitational mass behaves in a way that makes sense to me.
>The gravity from the positive mass galaxy attracts negative masses from all directions, and as the negative mass fluid comes nearer to the galaxy it in turn exerts a stronger repulsive force onto the galaxy that allows it to spin at higher speeds without flying apart. I don't get this, seems contradictory.
When a positive and negative mass particle interact gravitationally the positive mass is repelled and the negative mass is attracted.
[0] https://twitter.com/Astro_Jamie/status/1070303556266283008
Paper: https://arxiv.org/pdf/1712.07962.pdf Not a physicist, but my summary of the author's point would be: If you allow for matter with a negative mass and plug it into a n-body simulation. You seem to get what looks like dark matter from first principles. Namely, a halo of non interacting matter around galaxies in just the right "non-cuspy" shape. Their conclusion is that this is worth considering, as almost all ma…
Is it true that every other forces besides gravity is polarised? There's a repulsive nuclear strong force and an attractive nuclear weak force? EDIT: Partial answer is that there is a three-"color" polarization for strong force. I feel like it somewhat weakens the argument of "everything else is polarized, why not gravity" if the other forces are polarized in unique ways.
