Using trigonometry to calculate distance to the moon

I have seen a few Flat Earth theorists talking about very small distance to the Sun and Moon so I am wondering how that has been determined and why there are such large differences in the calculated distance between Flat earth theory and round earth theory.

1.  Can somebody tell me the size of the flat earth please?   What is the largest distance two observers on a flat earth can be apart?

2. Do flat Earthers have an accurate method of measuring the time or some method whereby two observers can know they are measuring at the same time?

Thanks for any answers

This article shows how Wilbur Voliva calculated the distance to the sun using trig, and found it is only 3000 miles away.

http://blog.modernmechanix.com/5000-for-proving-the-earth-is-a-globe/3/#mmGal

This article shows how Wilbur Voliva calculated the distance to the sun using trig, and found it is only 3000 miles away.

http://blog.modernmechanix.com/5000-for-proving-the-earth-is-a-globe/3/#mmGal

How do I claim the $5000 now he is no longer with us?  His calculations were wrong, we now know the correct numbers.

This article shows how Wilbur Voliva calculated the distance to the sun using trig, and found it is only 3000 miles away.

http://blog.modernmechanix.com/5000-for-proving-the-earth-is-a-globe/3/#mmGal

I notice he uses the same bogus perspective argument you used.

Using trig to measure the distance,  was done by Hipparchus in 129 BC,   http://www.phy6.org/stargaze/Shipparc.htm
He used a location where there was a total eclipse of the sun and then the distance from that location that the eclipse was 4/5 full.



He concluded the distance to the moon was  between 62 and 73 earth radii,  not too far from current measurements of 60 earth radii.


All this stuff was solved by Newton  around 1687,   and  described earlier  by Kepler,  the relationship between a planet's orbital period and distance from the sun is well known and understood,  see Kepler's third law. 
Orbits under an inverse square law force field ( gravity ) are always conic sections,   thus some orbits are highly elliptical ( comets ) and some nearly circular ( planets ).  These calculations work, and enable precise predictions.   At the present time man made spacecraft have visited all the planets, except pluto.

Back to the moon,   I would argue the distance is known with mm precision because of the laser ranging work that's been done,  bouncing signals off the retro-reflector left by Apollo has enable EME distances to be established that the moon is in fact drifting away at 3.8 cm per year. 

Quote from: jroa on April 26, 2015, 02:38:23 AM

This article shows how Wilbur Voliva calculated the distance to the sun using trig, and found it is only 3000 miles away.

http://blog.modernmechanix.com/5000-for-proving-the-earth-is-a-globe/3/#mmGal

I notice he uses the same bogus perspective argument you used.

Perspective has nothing to do with mathematics. 

Quote from: Aliveandkicking on April 26, 2015, 03:27:41 AM

Quote from: jroa on April 26, 2015, 02:38:23 AM

This article shows how Wilbur Voliva calculated the distance to the sun using trig, and found it is only 3000 miles away.

http://blog.modernmechanix.com/5000-for-proving-the-earth-is-a-globe/3/#mmGal

I notice he uses the same bogus perspective argument you used.

Perspective has nothing to do with mathematics.

Another one of your irrelevant but distracting correct statements.

I notice he uses the same bogus perspective argument you used