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The current state of affairs with regard to the expansion of the universe point to dark energy as the cause of the expansion of the universe. It is not a force though.
cosmology
An accelerating universe is a theory which describes and seeks to explain the increasing rate of the expansion of the universe.
The Big Bang Theory holds that our present Universe was, about thirteen billion years ago, in an extremely more dense state and has been expanding from that ever since. A sub-set of that theory is that our Universe has gone through an infinite series of expansions: each of which lead to a gravitationally induced end to the expansion, then a collapse of the Universe into a state of extreme density, and then another expansion. This is called the "Oscillating Universe" Hypothesis The latest observations make the latter idea very unlikely, as our present Universe will almost certainly never cease its expansion. Either we are in the first oscillation of the Universe that failed to stop its expansion, or there were no oscillations prior to this one at all. Unless later observations show that our present conclusions are wrong, there will no oscillations after this Universe. It is difficult to imagine how we could ever determine if our Universe was the first oscillation that failed to end its expansion or if there were simply no oscillations prior to this expansion at all.
That means that the Universe expands faster and faster. It causes the Universe to grow, and the general density of matter in the Universe to decrease over time.
Perhaps in the future astronomers will do all the redshifts of the 100 billion galaxies in the universe.
No, because it will be impossible for astronomers to get all 100 billion redshifts for all 100 billion galaxies in the observable universe.
It is not possible to list all designations and redshifts of all 100 billion galaxies (cseligman.com/text/atlas/pgc00.htm)
No. We do not have time to make so many measurements.
Yes. Dark energy is responsible for the expansion of the universe.
The current state of affairs with regard to the expansion of the universe point to dark energy as the cause of the expansion of the universe. It is not a force though.
Relativity theory establishes a speed limit for objects travelling through space - but the expansion of the universe is the expansion of space. There is no speed limit for that expansion.
cosmology
The alterations to the electromagnetic spectrum caused by the expansion of the universe.
An accelerating universe is a theory which describes and seeks to explain the increasing rate of the expansion of the universe.
An accelerating universe is a theory which describes and seeks to explain the increasing rate of the expansion of the universe.
Steady state universe. Like they used to think it was.