Is the speed of light constant between galaxies?

Like i said you have not the ability to think for yourself,As the universe expands lower d space is rushing in,
dark matter also expands as the space within is "unfolded" and ripped, produceing these massive amounts of protons, this is picked up and deposited by the lower d space, which we see as "gamma ray bursts", from what i understand quite luminous.As for ions, i was trying to explain protons without electrons, as we understand.Perhaps as near as we'll get to explainning dark matter in terms of our space/time would be the centre of a neutron star, "quark gluon plasma".Edited by sunshaker, : No reason given.Edited by sunshaker, : No reason given.Edited by sunshaker, : No reason given.

Yes, I do. I actually look at the evidence instead of making stuff up like you do. Based on what evidence? Based on what evidence?

What would generate the "pushing away" you describe here? For particles with charge, the corresponding anti-particle has opposite charge which would produce attraction. Anti-matter is not repelled gravitationally by normal matter. Is this yet another thing that you have simply made up? The above, poster sunshaker, is complete malarkey. Why would the two identical particles (photon and anti-photon) behave differently? You started off okay when you acknowledged that an anti-photon was just a photon, but then you seemed to go off into left field. Why would anti-matter repel (or attract) a photon?

When light comes into contact with dark matter, it is both a wave and a particle,
The wave is bent around the dark matter (quark gluon plasma in folded space/time),
Which we see as gravitational lensing, but the particle will go through the dark matter, but will also leave our frame of reference,
follow the particle through dark matter and its speed would not change, staying at c, but only relative to the the space it travels through, it would eventually pass through dark matter long after the wave as gone around.Once it leaves dark matter it once again becomes a wave and a particle and continues on it way, Until it reaches the next clumb of dark matter.The particle is never scattered, due the fact D/M Is folded space/time, that from our space/time perspective keeps the photon particle in a focused tight narrow beam.
where as the wave is is distorted by gravitational lensing.And if 80-90% of universe is dark/matter there is alot of bending going on, so we should only see distorted images, which we do not, that is because of the particle that travels through D/M (quark gluon PLASMA) is not distorted or scattered.

The neutral B mesons, B0 and B0
s, spontaneously transform into their own antiparticles and back.uncharged mesons may decay to photons.Physics - Particle Decays Point to an Arrow of Time

Dark matter can not be a plasma because plasmas absorb and emit light. Dark matter does not. You can not separate the wave function from a particle. The wave function describes the location of a particle. This is Quantum Mechanics 101. Where is your math?