Is the Universe really infinite or just really big? How can the Universe be infinite if it was all concentrated into a point at the Big Bang? How can the oldest stars in the Universe be older than the Universe? Can objects move away from us faster than the speed of light?.
Def. the "study of the origin, and sometimes the development, of the universe or the solar system, in astrophysics, religion, and other fields", any "specific theory, model, [myth], [or other account] of the origin [] of the universe", or. the "creation of the universe" is called a cosmogony..
An example of the cosmological principle on a universal scale is that, in any sufficiently large area of the universe, there is approximately the same number of galaxies.
An example of the cosmological principle on a smaller scale is the even distribution of sand and pebbles on a beach..
Cosmology is a branch of astronomy that involves the origin and evolution of the universe, from the Big Bang to today and on into the future.
According to NASA, the definition of cosmology is "the scientific study of the large scale properties of the universe as a whole.".
Not that long ago, most serious scientists considered cosmology a branch of philosophy
But in recent decades, observations by the Hubble Space Telescope and probes of the microwave radiation left over from the Big Bang have put cosmology on a sound observational footing
For example, models which describe the observable universe as having a lower density than surrounding regions can account for the accelerated expansion without dark energy
Cosmologists have often assumed that we are not in a “special” location in the universe
