Question

Imagine you are standing in the center of a wide, open field. Where the land and sky meet as far as you can see in any direction is the horizon . If we were to simplify your view, what shape would best represent the full horizon ? Where would you be standing relative to the shape ? Sketch and describe your answer below.

Answer 1

it's like standing on a flat plain which is covered by a spherical dome and the horizon meets at the perimeter of the sphere and I'm standing at the centre of the sphere but actually it's a very little part of a giant spherical shell of atmosphere which made the light rays to difract in such a way to look like this, the aperture of a normal human eye is very little in comparison with the dimension of earth that's why it seems spherical centred on you

here is the sketch-------