Then when you've measured the distance to the moon those three ways, you can then measure the distance to the sun using trig!!!! Wow, yes, these things are able to be observed and measured by the average person! That's what we call 'science'. What science cannot do is to simply ignore everything that does not confirm it's bias.
http://www.astro.cornell.edu/academics/courses/astro201/aristarchus.htm
RE: The Heliocentric Lie: Distance To & Visibility Of Sun & Moon