Since dark matter exist, and the universe is full of it (96%?) then are they in and around earth? If products made of dark matter zooms in our sky, can we see any light coming out of it (if they are natural light and not dark energy) ? Time to connect to the UFOs....Please Register or Log in to view the hidden image!
Not sure if dark matter has been proven to exist, isn't it just a theory to explain extra gravity in space that cant be accounted for by conventional understanding?
The new model in cosmology has the universe consisting of about 73% dark energy, 23% dark matter and 4% matter that we can observe. Most think there are two kinds of dark matter, some of it ordinary (baryonic) matter we don't see because it is not reflecting light and we can't "observe" it. There is also exotic dark matter that we don't know exactly how to describe, but I don't think they believe it has "anti-gravity" properties. Dark energy is the other stuff, or some call it the cosmological constant, or some call it quentessence. Nothing is known about it except for one thing. I'm sure you have heard of the increasing rate of expansion of the universe. This has been checked by different methods to verify the universe is indeed expanding at a faster and faster rate and is generally agreed upon. The problem is, how could this be happening? It should be slowing down this long after the big bang, and gravity, an attractive force, should be slowing the expansion also. But instead, it is expanding faster and faster, some of the most distant quasars are even receding from us faster than light. That is where dark energy has to come into play. Something with repulsive- gravity properties has to be causing the expansion, gravity tries to draw things together and something has to be causing the opposite effect. Nothing is known about it, only the observed effects.