19,916
edits
Changes
no edit summary
: The [[Universe]] is around 13.7 billion [[year|Earth years]] old.
: Everything that has ever happened and ever will happen will all take place in the [[Universe]].
==Key Stage 4==
===Meaning===
The [[Universe]] is everything that exists.
===About the Universe===
: The [[Universe]] has over 200 billion [[Galaxy|galaxies]].
: The [[Universe]] is around 13.7 billion [[year|Earth years]] old.
: Everything that has ever happened and ever will happen will all take place in the [[Universe]].
===Origin of the Universe===
====Big Bang Theory====
: The current prevailing [[Scientific Theory|theory]] for the origin the modern [[universe]] is the [[Big Bang Theory]] backed by [[evidence]] which shows all the [[observe]]d [[galaxy|galaxies]] in the [[universe]] must have all begun at one small point in [[space]].
Evidence:
[[Redshift]] - [[Redshift]] shows that all of the [[galaxy|galaxies]] are moving away from each other at very high [[speed]].
[[Cosmic Microwave Background]] - [[Microwave]] [[radiation]] coming from all directions in [[space]] show that at one point the entire [[universe]] was roughly the same [[temperature]] everywhere.
Old [[Star]]s - There have not been any [[star]]s [[observe]]d older than 13 billion years.
===Future of the Universe===
: Current [[evidence]] shows the [[galaxy|galaxies]] are accelerating away from us suggesting the [[universe]] will continue to expand forever.
: Some [[scientist]]s used to believe the [[universe]] would end with all the [[matter]] falling back together. The [[Scientific Theory|theory]] was called [[The Big Crunch]] but it seems unlikely to be true due to the counter [[evidence]].