Stardust and the lives of the Stars.
The number 42 is not the "Answer to the Ultimate Question of Life, the Universe, and Everything"
I have made a conceptual breakthrough in Physics, thirteen billion years ago, a major event
appeared in the Universe. Star evolution began spewing out vast amounts of matter.
From my son Taynar, "There was a tremendous amount of mass ejected from each stars'
evolution". Only some of the ejections form into new stars and visible nebulae.
The rest is moves through adjacent gravity fields making the Universe, more and less
transparent all through the universe.
1. These particles (1mm to 140,000km), in their billions, unseen, continue to accumulate and their gravitational effects were the beginnings of assumed Dark Matter. The background noise of non-dark-matter particles has misled the experimenters. The only evidence for dark matter's existence is cosmological.
2. These particles (1mm to 140,000km), in their billions, unseen, accumulated but their visual effects were eventually changed by gravitational effects starting soon after stars began forming, billions of years ago. As the dust gradually accumulated, they morphed into blobs of baryonic matter. Not enough to form stars,but enough to allow more passage of light passing through. The Universe began to clear. However, near a galaxies mass these dust particles were forced to continue to separate. Due to a Roche limit, if you will. Their obscuration effects were the beginnings of assumed Dark Energy.
The Crab Nebula is expanding at about 1,500 kilometres per second.
or roughly 1 lightyears/1000 years
or roughly 1000 ly/millionYears
or roughly one million light years/one billion years
or roughly five million light years/five billion years
Personal beliefs.
The velocity of light is equal to the velocity of gravity.
Not a constant but simply the current expansion value of the Universe
at that place in space and time.
The entire Universe is observable.