I agree, the fewer assumptions the better. I do assume we exist in relativistic space. Galilean relativity assumes that. If you want to get fancy, at least Lorentzian Relativity doesn't try to mix time and space into some imaginary "space-time".
At relativistic speeds, clocks slow down and lengths shorten. But time does not dilate, and space does not warp.
That single assumption might have made an ass out of Albert E.
The speed of light is not constant. It travels the "speed of light" only in a vacuum. It travels slower in a denser medium like air, and slower in water, and even slower in a much denser medium like glass. Light travels at approximately
300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to
225,000 kilometers per second in water (refractive index =
1.3; see Figure 1) and
200,000 kilometers per second in glass (refractive index of 1.5). The aether is very thin, but it has mass. Thus, gravity compresses the aether, increasing it's density around large gravitational masses. This increased aether density slows the propagation speed of light, resulting in simple refraction (as seen in gravitational lensing and Eddington's solar eclipse observations in 1919). The existence of the aether provides a simple explanation of the solar limb red shift phenomenon. Relativity offers no explanation.
As an added bonus, the extra density of the invisible aether that collects around galaxies adds considerable invisible mass, aka "
dark matter".
A proper understanding of the universe cannot be derived from denying the existence of that which must exist.
My most basic assumption is that light is a wave. As such, it must propagate through a substance. That substance is the aether.
And since light is not a particle, it cannot travel forever through outer space. An electromagnetic wave propagating through the aether can travel a very long distance, but not an infinite one. It must lose energy energy over time. Light must have a distance limit as well as a speed limit. That distance limit is approximately 13.8 billion light years.
Time is an emergent property of nature, not a fundamental one.
Gravity is a field effect. It travels at least 20 billion times the speed of light.
I further assume that singularities are mathematical artifacts. They do not exist in nature.
---Futilitist