You do know people have special telescopes that can look at the Sun? Please don't try it yourself or you will go blind. They can see how it curves. The Sun has features. I don't expect you will believe in the probes that have been sent to take a closer look, but I can't be arsed to try and convince you.

I have not looked into the exact details of the measurement, but thousands of astronomers have. Compare that to the few 'sceptics' who have done zero calculations, but think 'it does not seem right'.

This is a pointless exercise if you have already set your mind.

I'm off on a long flight next month. I hope we don't accidentally go over the edge!

Take it easy.