I was composing a reply and somehow it got posted. My mistake but I was just getting started. And I had to stop to take care of something else. I have not even read your reply yet but I wanted you to know what happened. I will eventually complete my first posting. I a'm sure her message will be...
Both GR (general relativity) and QM(quantum mechanics) are logically self consistent and work at the scale of their domain. However, their domains do not overlap. When theoritical predictions are tested and proven by experimental results the Theory is supported. That is the classical way of...
Good question Resurgance, good answer Bandersnach, good follow up Marcus. I have liked the the flow of concepts. I thought about a reply to the original question then I saw the answer given and the follow up. I realized then what a disruption and discourtesy it would have been for me to answer...
I think useful to the discussion is to differentiate between a philosopher and a philosophy. My interest is science and the philosophy of logic and geometry that I think are basic to science. Modern cosmology came together in my view with General Relativity. Shortly after quantum mechanics was...
It looks to me we are both correct in the context we used. The universe is roughly 70% dark energy and 30% gravity or matter. The universal gravitational constant coverts the terms. The whole universe is 100% divided into 70% dark energy plus 25% dark matter and 5% ordinary matter. Of the 30%...
Space-time mathematically starts at a point. There is no space or time outside of the singularity at the start of the Big Bang. There was no time or space at that point. Then things change
and time and space are created at that point; they are linked together and define each other.
The Big Bang...
[FONT=-apple-system-font]i am just trying to make sense of this so allow me to round numbers - On a cosmic scale the universe is about 70% dark energy and 30% gravitational energy (power). Of all the gravity 85% is dark matter and 15% is light matter (baryons). The local group is gravitationally...
Observation: Dark Matter,
I do not see why DM would not keep everything gravitationally bound. It keeps the galaxies bound along the filaments. It seems that dark matter would counteract the expansion. What am I missing?
(Assuming Big Bang cosmology) Before the BB there was no space - time. "The center of expansion today is every point in the universe because every point was the same point in the beginning". (Allen Sandage)
Space is doing much more than expanding, it is full of virtual particles. Also space...
The expansion of space is not a reference to the speed of galaxies but to the consistencies in red shift of element spectra from distant galaxies. Because of the red shift being proportionally the same is every direction the red shift comunicates that space itself is expanding. If space was not...
The "vacuum.html" for me was an excellent synthesis of perspectives that resolves the issues in this thread. Thank you for the reference. I knew the different perspectives but the synthesis of them was very helpful to me to clear up miscommunication. I mentioned "I anticipate Feynman was using...
The thought entered my head by way of the Richard Feynman lectures. Wheeler and Dirac made the same reference and Feynman worked with them. The thought experiment example that Feynman used was " There is enough negative energy in a teaspoon of of vacuum energy to boil away all the water on...
A photon has no history because____________
Your declaration leaves the reader guessing. Do you mind filling in the blank____?
A photon traveling at C is in a reference frame where time stops passing so the concept of history is irrelevant. Is this interpretation accurate or relevant to your...