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== Examples of Absolute Zero ==

== Examples of Absolute Zero ==

No place in our universe can reach absolute zero, but there are places that get close.  [[Space]] is approximately 2.73 Kelvin.  This is not because heat from [[star|stars]] in the universe keep the temperature up, but because of [[Black-Body Radiation]], which occupies the [[vacuum]] of space.  This [[radiation]] keeps the universe at this temperature.  The [[Cosmic Backround Explorer]] measured this value.  It has since been theorized that this risidual heat energy is leftover from the [[Big Bang]], the theorized beginning of our universe, although this has not been proven.   

No place in our universe can reach absolute zero, but there are places that get close.  [[Space]] is approximately 2.73 Kelvin.  This is not because heat from [[star|stars]] in the universe keep the temperature up, but because of [[Black-Body Radiation]], which occupies the [[vacuum]] of space.  This [[radiation]] keeps the universe at this temperature.  The [[Cosmic Background Explorer]] measured this value.  It has since been theorized that this residual heat energy is leftover from the [[Big Bang]], the theorized beginning of our universe, although this has not been proven.   

== Reaching Absolute Zero ==

== Reaching Absolute Zero ==