Hi Roger:
The Apparent retrograde motion of Mars can be seen with the naked eye.
https://en.wikipedia.org/wiki/Apparent_retrograde_motion
The math to predict it's orbit is much simpler when the heliocentric system is
used.
The Antikythera mechanism needed to add Epicyclic gearing to account for the
planet motions in the geocentric system.
https://en.wikipedia.org/wiki/Epicyclic_gearing
https://en.wikipedia.org/wiki/Occam%27s_razor
--
Have Fun,
Brooke Clarke
https://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be limited by how
well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.
-------- Original Message --------
A better question is how could you show _before telescopes were invented_ that the earth orbits the sun rather than
the sun orbiting the earth. We all observe that the sun, moon and stars rise and set. Sundial design is the same for
geocentric and heliocentric systems.
Regards, Roger Bailey
Global location: N 48.6°, W 123.4°
*From: *Ruud Hooijenga <mailto:[email protected]>
*Sent: *June 17, 2019 7:22 AM
*To: *[email protected] <mailto:[email protected]>; [email protected]
<mailto:[email protected]>
*Subject: *Re: Can a sundial disprove Flat Earth?
No, that was not a proof of the globe; just a measurement of its size, assuming the globe. A small, close sun over a
flat earth could give the same result for the two locations.
However, several other observations had already proved the globe.
And you could repeat the Eratosthenes experiment in more than two places, so that the flat earth/local sun assumption
would have to be discarded.
However, to a dedicated flerfer this will prove nothing, because everything is a NASA hoax (it was even in
Eratosthenes' time, apparently).
It's no use wrestling a pig - it will only get you dirty, and the pig enjoys it.
Rudolf
52-30 N 4-40 E
Op 17 juni 2019 om 16:04 schreef [email protected]:
Didn't Eratosthenes show that the earth was round by measuring the diameter?
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