on a spherical earth the horizon would appear as a straight line no matter how high up you go, because it curves away from you at the same angle in all directions. This means it would curve out of view at the same distance no matter which direction you look, which from your perspective would look straight and uniform.

Ironically if the earth was flat then a non-uniform horizon would be necessary and documented, because when you go near the edge, the shape of the horizon would take on the shape of the edge instead of having a uniform and consistent horizon everywhere on the planet.

on a spherical earth the horizon would appear as a straight line no matter how high up you go, because it curves away from you at the same angle in all directions. This means it would curve out of view at the same distance no matter which direction you look, which from your perspective would look straight and uniform.

But say as you move in any direction, you would find that the horizon moves with you, and still looks uniform. Which is exactly what high altitude videos show.

Ironically if the earth was flat then a non-uniform horizon would be necessary and documented, because when you go near the edge, the shape of the horizon would take on the shape of the edge instead of having a uniform and consistent horizon everywhere on the planet.

on a spherical earth the horizon would appear as a straight line no matter how high up you go, because it curves away from you at the same angle in all directions. This means the horizon would appear at the same distance no matter which direction you look, which from your perspective would look straight and uniform.

But say as you move in any direction, you would find that the horizon moves with you, and still looks uniform. Which is exactly what high altitude videos show.

Ironically if the earth was flat then a non-uniform horizon would be necessary and documented, because when you go near the edge, the shape of the horizon would take on the shape of the edge instead of having a uniform and consistent horizon everywhere on the planet.

on a spherical earth the horizon would appear as a straight line no matter how high up you go, because it curves away from you at the same angle in all directions. This means the horizon would appear at the same distance no matter which direction you look, which from your perspective would look straight and uniform.

But say as you move in any direction, you would find that the horizon moves with you, and still looks uniform. Which is exactly what high altitude videos show.

Ironically if the earth was flat then a non-uniform horizon would be possible and documented, because when you go near the edge, the shape of the horizon would take on the shape of the edge instead of having a uniform and consistent horizon everywhere on the planet.