Changes

== Today ==

== Today ==

In the 1800s, Norman R. Pogson proposed and codified magnitude to be a logarithmic scale where the diffrence between the first and fifth magnitude is one hundred times brighter.  The ratio of one number to the next is the fifth root of one hundred, or about 2.512 - known as the Pogson ratio.<ref>http://www.astro.ufl.edu/~guzman/ast4402/lectures/lect06.html</ref>

In the 1800s, Norman R. Pogson proposed and codified magnitude to be a logarithmic scale where the difference between the first and fifth magnitude is one hundred times brighter.  The ratio of one number to the next is the fifth root of one hundred, or about 2.512 - known as the Pogson ratio.<ref>http://www.astro.ufl.edu/~guzman/ast4402/lectures/lect06.html</ref>

== Examples ==

== Examples ==