Take a good look at the moon tonight. See how much detail you will be able to observe with your eyes. If you wear glasses, you must wear them and make sure to clean them first.
What is the size of the smallest land mass that you can clearly notice separate contours?
For the Flat Earthers out there, if you live in a section of the world that has heavy cloud coverage or you live in a pollution environment, your test results are not valid.
We need people to be in a dry climate area with very little cloud coverage, like Arizona, Nevada, Greece, Malta, Israel, Egypt, Libya, Australia and there are probably may more out there.
Below is a large image of the moon from NASA, print it out for a reference.
Now, the science behind this experimentThe society of Ophthalmologist state that 20/20 vision is when you can clearly see the separate contours of an object that is 1.75 mm at a distance of 6 meters.
Citation -
https://en.wikipedia.org/wiki/Visual_acuityFrom trigonometry, the tan (θ) = Opposite side / Adjacent side
tan (θ) = 0.00175 / 6 =>
θ = 0.01671 Degrees
NASA tells us that the moon has a diameter of 3,476 km and has a distance of 382,500 km from earth. Based on this information, the angle that we get is
tan (θ) = 3,476 / 384,400 =>
θ = 0.52067 Degrees
Which means that we can see the moon, which is clearly true
Now, here comes the fun part.
At a distance of 384,400 km, based on 20/20 vision, we should be able to see
Opposite side = tan (θ) * Adjacent side
Opposite side = tan (0.01671 Degrees) * 384,400 km
Opposite side =
112.12 kmWe should be able to clearly separate contours of an object that is 112.12km in size.
The image is 2957 pixels in diameter, which means that each pixel represents 1.755 km, if the moon is 3,476 km in diameter.
Which in turn means that if we have 20/20 vision, we should with the naked eye be able to see separate contours of an object of the size of 95 pixels (95.43) .

Which is equivalent to the yellow box in the image.
Granted, not everybody has 20/20 vision, but everybody that wears glasses is very close to that.
What happens if we don’t clearly see the separate contours of an object that size. We have three possibilities.
1) We need new glasses
2) The distance of the Moon to the Earth is greater at this diameter
3) The diameter of the Moon is smaller at this distance
4) The diameter and the distance of the Moon are different than what NASA is telling us.
What happens if we see more details that we should see?
1) We have better vision than 20/20 (it could happen)
2) The Moon is closer to the Earth, at this diameter.
3) The Moon has a bigger diameter at this distance
3) The Moon is closer to the Earth and the diameter is different
This experiment can’t be a way to prove the heliocentric Hypothesis, but it is a good indicator.
If the average people in the street can’t see clear separate contours on the moon at the specified length, then we are starting to have a problem.
What about cameras. Place them on a tripod, zoom in at max optical (no digital) zoom
If you camera is the Nikon P900 camera which has an optical zoom of 83 X, we should be able to clear separate contours on the moon at the level of 1.15 pixels.
Posts your images on the forum with the zoom that you used.