Dark energy Definition and 559 Threads

http://news.bbc.co.uk/2/hi/science/nature/3155200.stm

what is dark energy? i think that when dark energy was discovered science didnt know how profound the discovery was. i think that dark energy is the primal source of everything, i imagine an instability in the dark energy built to such an extent that it could no longer be contained, this...

Properties of "Dark Energy" ? Has their been any progress in discovering what properties this Dark Energy might have?

Well, apparently we have now found new and more direct evidence for the existence of the so called 'dark energy.' I find it quite remarkable. http://www.space.com/scienceastronomy/dark_energy_030805.html

What's dark energy? It's important to know what is the most common type of energy of the universe

I was just reading a 1995 paper by Lee Smolin arXiv:gr-qc/9505028 "Linking topological quantum field theory and non-perturbative quantum gravity" not such a catchy title, but contains some surprising things We all know the story about how Einstein put Lambda (cosmological constant) in...

What implications if any does the potential existence of dark energy have on the speed of light passing through empty spaces between galactic structures [remote space where dark energy is thought by some to dominate]? How might the permittivity and permeability constants be effected?

Dark Energy is now thought by some to contain 65% of the total mass of the universe. It will accelerate the expansion of the universe for some 20 million years. Then all normal matter/energy will have its constituents torn asunder resulting in a universe consisting entirely of Dark Energy...

this is not to argue or persuade but just to share a calculation. no answer needed unless you particularly like something about it. several websites, eg. NedWright's Cosmology tutorial have formulas for things like the critical density and the estimate that real density is very close to...