Changes

The generally accepted [[scientific theory]] which describes the origin and evolution of the universe is [[Big Bang]] [[physical cosmology|cosmology]], which describes the [[expansion of space]] from an extremely hot and dense state of unknown characteristics. The universe underwent a rapid period of [[cosmic inflation]] that flattened out nearly all initial irregularities in the energy density; thereafter the universe expanded and became steadily cooler and less dense. Minor variations in the distribution of mass resulted in hierarchical segregation of the features that are found in the current universe; such as [[galaxy cluster|clusters]] and [[supercluster]]s of [[galaxy|galaxies]].  There are more than one hundred billion galaxies in the universe,[http://astronomy.swin.edu.au/~gmackie/billions.html] To see the Universe in a Grain of Taranaki Sand, Swinburne University each containing hundreds of billions of stars, with each star containing about 10x57th power of [[atoms]] of hydrogen.

The generally accepted [[scientific theory]] which describes the origin and evolution of the universe is [[Big Bang]] [[physical cosmology|cosmology]], which describes the [[expansion of space]] from an extremely hot and dense state of unknown characteristics. The universe underwent a rapid period of [[cosmic inflation]] that flattened out nearly all initial irregularities in the energy density; thereafter the universe expanded and became steadily cooler and less dense. Minor variations in the distribution of mass resulted in hierarchical segregation of the features that are found in the current universe; such as [[galaxy cluster|clusters]] and [[supercluster]]s of [[galaxy|galaxies]].  There are more than one hundred billion galaxies in the universe,[http://astronomy.swin.edu.au/~gmackie/billions.html] To see the Universe in a Grain of Taranaki Sand, Swinburne University each containing hundreds of billions of stars, with each star containing about 10x57th power of [[atoms]] of hydrogen.

 

==Name of our universe==

==Name of our universe==

In the same way that the ''[[Moon]]'' refers to our ([[Earth]]'s) moon, ''the Universe'' is used by some cosmologists to refer to our universe.  In this article, ''the Universe'' is equivalent to ''our observable universe''.

In the same way that the ''[[Moon]]'' refers to our ([[Earth]]'s) moon, ''the Universe'' is used by some cosmologists to refer to our universe.  In this article, ''the Universe'' is equivalent to ''our observable universe''.