Neil deGrasse Tyson and His ‘Pear-Shaped’ Analogy

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In a talk show, Neil deGrasse Tyson explained the figure of the Earth. He told the audience that the Earth is practically round, but it is a little farther from the center near the equator compared to the poles. And that in the southern parts, it is a bit farther from the center than in its northern regions. To illustrate the fact, Neil used the analogy ‘pear-shaped.’

Flat-Earthers really love to ridicule the ‘pear-shaped’ analogy. But they are mistaken. If they watch the entire unaltered video, they will find Neil explained the fact very clearly.

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The Eratosthenes Experiment: Proving the Earth is Spherical

In 205 BC, Eratosthenes successfully determined the circumference of the Earth by measuring the length of the shadow cast by a rod. He did the measurement in Alexandria and timed it to coincidence when the Sun is directly overhead Syene.

2222 years after that, some flat-Earthers tried to refute the Eratosthenes experiment. They say the experiment can be applied to the flat-Earth model.

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The Curvature of the Water Surface

Flat-Earthers mention the curvature of water a lot. According to them, the curve of the water can never be observed, and thus, the Earth is flat.

The problem with such an argument is that they usually conclude that from a very small amount of water. Water in a glass or a bucket will practically look flat. Not because there is no curvature due to Earth’s gravity, but because the water is in such small amount so that the curvature is minuscule and impossible to observe, let alone with the naked eye.

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The Oblate Spheroid Shape and Pictures of the Earth From Space

The Earth is not perfectly spherical. Its diameter is longer across the equator than between the poles; it is oblate spheroid. This fact is often questioned by flat-Earthers. According to them, every picture of the Earth from space shows the Earth as a perfect sphere, and never as an oblate spheroid. Then they would present it as ‘evidence’ that scientists have been lying to us.

But it is actually possible to determine that the Earth is in fact oblate spheroid from pictures of the Earth taken from space.

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