From any one location on the surface of the Earth, it’s impossible to tell what our planet’s shape is. Having a single vantage point, even with a clear horizon, allows you to see a handful of miles (or kilometers) in any direction, but that can only allow you to place constraints. The Earth could be flat, or spherical, or in hydrostatic equilibrium, or egg-shaped, or irregular, and you wouldn’t know. All that you can know, from a single location on our surface, is that the Earth is indistinguishable from flat beyond a certain degree. If the Earth is round, it must be quite large: more than a few hundred miles (or kilometers) in diameter.
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Answer:
From any one location on the surface of the Earth, it’s impossible to tell what our planet’s shape is. Having a single vantage point, even with a clear horizon, allows you to see a handful of miles (or kilometers) in any direction, but that can only allow you to place constraints. The Earth could be flat, or spherical, or in hydrostatic equilibrium, or egg-shaped, or irregular, and you wouldn’t know. All that you can know, from a single location on our surface, is that the Earth is indistinguishable from flat beyond a certain degree. If the Earth is round, it must be quite large: more than a few hundred miles (or kilometers) in diameter.
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