Can you give me a hint about excess emissions

@TheMiddleWay Thank you for info. That helped a great deal.

@TheAstroChuck Once we figure out exactly what dark energy is, it will no longer be dark energy. We will assign a proper name to it. It's silly to think that all the dark energy consists of one type of energy. Only seems reasonable to assume dark energy is made up of more than one kind of energy. Once we discover more, the energy we learn of will be labeled and will no longer be in the "dark" category. I'm not saying that the % of dark energy will literally and physically decrease. If we say the universe is 90% dark energy and we hypothetically learn that it is made up of 10 different types of energy at 9% each, each of the 10 different energies will all have their own respective labels but still make up the 90% that was once dark/unknown to us.

@TheMiddleWay the theist hypothesis is based on faith. The scientific approach to dark matter is based on the amount of matter estimate based on several models, which amounts to less than needed to justify what gravity does. Therefore there is a delta, elusive so far as being quantified but we know it is there. It's not an act of faith, its just an arithmetic subtraction. Last but not least, as you said, this is how I see/understand it.

@TheMiddleWay ok, here is another angle. Both, theist and scientist agree gravity exist. They both agree on methods to estimate the amount of matter accounted. They both agree none of them will bring the whole universe to a scale and weight it, therefore the need for an estimate. They both agree the gravitational effect cannot be justified with the amount of matter accounted. They both agree there is a delta unaccounted for. Here is the part they don't agree with: The theist says it's God, the scientist says I don't know yet.

@TheMiddleWay No, I still disagree. We know dark matter exist because gravity is pulling everything in the universe and this cannot be justified with the accounted matter. There is not enough visible matter therefore, it must be something else doing the heavy work out there, we just don't know yet what it is. That doesn't make it an intangible concept like God. The gravitational pulling over distance and time is very physical and real. (Additional comment... Perhaps the name dark matter is a misnomer. It should be call "We don't know what it is but we know what it does" .... As opposed to God, which we know does nothing)

@TheMiddleWay ........oh well, I tried. You will believe what you want to believe and that is ok with me.

@TheMiddleWay I get that, you're not going to budge. You are right, it seems that I was trying to convince you but I was not. We don't even know what is out there beyond the visible universe, there will be always limitations to what we can do but that doesn't mean we should attribute them to God (any shape or form). Lighting was as unknown to the cave man as dark matter it is to us. The cave man didn't stop, why should we?. I think the best common ground for both of us is that we don't know today.

@TheMiddleWay oky doky, case closed then