What Is Dark Energy?
After supernova universe was expanding up to one point and after that strange matter continued this expansion. Scientists called this matter the Dark Energy. Dark energy has so much of dark matter that is associated with it and we still don’t know much about it. Though, man has made such large strides in astronomy and has been able to find out so much, at the same time, there is so much more that remains and that is the dark matter.
There is the mysterious and unknown form of energy in the universe that man has not been able to fathom much about. This energy is in the form of one that is made by heavenly bodies like neutron stars, the sun, Galileo Galilei and the various black holes that abound. Almost as much as 23% of the universe is not visible to the naked human eye. This means that there is so much of dark energy being formed in the universe and we are not aware of it. There are multitude amounts of different ways in which these gases and energy can get together in the most unknown of ways and probably go on to form stars and galaxies that way. This is the place where most of the mass in the universe accumulates. The dark energy is more concentrated towards the center and gets less as it goes outwards.
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Hubble’s Law — which describes how quickly the universe is expanding as a result of dark energy — has been renamed the Hubble-Lemaître Law to include Belgian astronomer Georges Lemaître, who actually first proposed an expanding universe and connected it to Einstein’s theory of General Relativity. from Astronomy
If you take a 10^55 gram proton and blow it up to cosmological scale, you are left with the exact energy density of cosmological constant/dark energy. The big bang = the big pop – a proton escaping a mother Universe and expanding. Paper and math in comment from holofractal