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Cosmic Energy Budget, vs time
Questions (below) relate to total energy (sum of terms) in this paper:
In the paper, "The Cosmic Energy Inventory" Fukugita / Peebles, They created a list of all known forms of energy within the universe today. (They said, "We present.............at the present epoch".........which I take to mean, correct me if wrong, they are listing all forms of energy that exist within the entire modern (co moving with us) universe.) For this question I ignore all "Dark" forms of energy and focus only on the 5% that is in forms we have detected such as neutrinos, baryons, EM radiation. Ignoring Dark mass and Dark energy, the total universe energy inventory is: 1.00  0.954 = 0.046 and the primary 4 constituents a Neutrinos = 0.00126 Baryon Rest Mass Warm Intergalactic plasma = 0.045 Intracluster plasma = 0.0018 Main Sequence Stars spheroids and bulges, disks and irregulars 0.0015 + 0.00055 = 0.00205 These 4 components combined constitute 0.05011. (This is greater than 4.6%, so error bars must be the culprit unless I did the addition wrong.) At any rate, this 100% of known stuff (5% if we were to include dark stuff) must total to the same value no matter what age of the universe I consider, right? In other words, section 7 is post stellar radiation. section 6 is post stellar nuclear binding energy. And the energy associated with those two categories must have originally been associated with the section 3, baryon rest mass. ie, fusion energy release reduced baryon mass and increased radiation and nuclear binding energy. But the total energy (if I sum all of the forms in addition to these 3) at previous epochs of our universe would be the same as the total today, Right? In other words, 100% of this 5% of stuff we know about, has always been and always will be, 100%. The quantity of energy in each category may shuffle around a little, but the total will remain unchanged. So if I want to make a plot of this inventory as a function of age of the universe, then I should make certain to track the sum of the individual components to make sure they always sum to 100% of what 100% is today, Right? Thanks, rt 
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Cosmic Energy Budget, vs time

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Cosmic Energy Budget, vs time

#5




Cosmic Energy Budget, vs time
Wrong. First, you are almost assuming that that which you wish to prove
is true. Second, just because two things are linearly related doesn't mean that they are the same thing, nor even that one causes the other. There is a good anticorrelation between global warming and the number of pirates, a good correlation between the number of stork pairs and the birthrate. OK, sure, I know. The number of earthquakes has dramatically increased over the past 100 years too. As has sale and installation of seismometers. correlation does not prove causality. However, causality does come with correlation. And sometimes, the answer is right in front of our face and we ignore it because it is too (seems impossibly) simple. I'm poking at whether we're overlooking something right in front of our face. Might exothermic processes be linked to the expansion of the universe? If so, then the energy density of the vacuum would remain nearly constant over time. but it has as best I can find. Why can't it be that what we call empty space is just the "vapor" form of what we call "matter"? Because it doesn't work quantitatively. What do you mean? I read that the energy density of the vacuum has remained constant...........ie, Dark Energy has had the same energy density over time. And at least today, the value for Dark Energy I've seen is close to the value for all forms of energy (cbr, starlight, etc.) So quantitatively dark energy is close to the energy density of other forms of energy. I'm still working on assembling a plot for all ages of the universe, lots of work, little time to do it. Thanks, rt 
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