Don't you think it's strange that the founders of the helicentric model (based on their observations only) changed the distance from the earth- sun varying from 5-150 million km ?
How would you suggest that such a distance might be measured without even a telescope or even accurate instruments for measuring angles?
Aristarchus calculated that the Sun is about nineteen times farther than the Moon; it is actually about 390 times farther than the Moon.
Others, including
Eratosthenes made estimates, but we're still far out.
But
The first rigorous and accurate scientific measurement of the Earth-Sun distance was made by Cassini in 1672 by parallax measurements of Mars. He and another astronomer observed Mars from two places simultaneously.
Well after the time of Copernicus.
'We have better equipment now' is a very flawed answer. It is proof that observations made from earth + respective conclusions are extremely tricky !
There is
nothing flawed about it. Measuring a distance of 150,000,000 km from earth was no easy task witout modern instruments.
Maybe you could explain how they could do it better with not even a telescope.
In only a decade they mastered to go to a celestial body that orbits over 3000 km at a distance of 380.000 km.
I cannot fathom what you mean by this at all.
The success rate compared to technological achievements on earth is unmatched by an incredibly huge factor.
All of a sudden the observations made from earth provided accurate data about absolute distance, angle, radiation and speed in relation to the earth - moon journey.
That is all total rubbish. There's no "All of a sudden the observations made from earth"!
There were numerous moon missions, include hard landings and soft landings allowing th moon's gravitation to be accurately measured well before manned flights anywhere near the moon.
Then there were the Apollo missions that orbited the moon but did not land.
In other words, there was a tremendous amount of research beforehand allowing lunar lander simulators etc to be built.
You do argue from a point of total ignorance, don't you?
From earth they calculated the exact parameters for rendezvouz between the LM and the CM, re-entry and more. Not an inch off !!! , so to speak.
Your statement "Not an inch off !!" is utterly inane. The LEM was guided by radar and finally manual control to rendezvous.
You, like most flat earthers, seem to think that because you can't do it, nor understand it, it can't be done.
Well, dutchy, smart as you might be that simple is not true!
I can get you reams of pre-Apollo 11 papers from NASA detailing the earlier research, but a
NASAphobe like yourself wouldn't listen!
You think that
NASA destroyed your pretty little flat earth. Well,
they didn't! Your flat earth never was.