who said that the earth is oblate spheroid ?

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who said that the earth is oblate spheroid ?

Here are some links that might be useful to you:

https://astronomy.stackexchange.com/questions/33382/when-did-people-discover-that-the-earth-is-not-an-ideal-sphere-but-a-little-fla

https://astronomy.stackexchange.com/questions/33382/when-did-people-discover-that-the-earth-is-not-an-ideal-sphere-but-a-little-fla
history – When did people discover that the Earth is not an ideal …
But it’s very hard to say who was the first to discover that the Earth is an oblate spheroid (more or less) is given that so many people contributed to this discovery. This, by the way, is how modern science works. Most modern scientific discoveries are team efforts. In the case of physics at the Large Hadron Collider, the list of authors on …

https://www.britannica.com/science/oblate-spheroid

https://www.britannica.com/science/oblate-spheroid
Oblate spheroid | geometry | Britannica
An oblate spheroid is formed by revolving an ellipse about its minor axis; a prolate, about its major axis. In either case, intersections of the surface by planes parallel to the axis of revolution are ellipses, while intersections by planes perpendicular to that axis are circles. Isaac Newton predicted that because of the rotation …

https://www.scientificamerican.com / article / earth-is-not-round

https://www.scientificamerican.com / article / earth-is-not-round
Strange but True: Earth Is Not Round | Scientific American
Isaac Newton first proposed that Earth was not perfectly round. Instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator. He was correct …

https://www.aps.org/publications/apsnews/202211/backpage.cfm

https://www.aps.org/publications/apsnews/202211/backpage.cfm
The Back Page: How Newton Derived the Shape of Earth
13 oct. 2022He concluded that Earth, modeled as a homogeneous spheroid that rotates with uniform angular velocity, must have polar and equatorial axes with a length ratio of 689-to-692 to be in a state of hydrostatic equilibrium. … he was modeling Earth’s overall figure — an oblate ellipsoid with an ellipticity of 3-to-692 (about 1-to-230.7). Using …

https://en.wikipedia.org/wiki/Earth_ellipsoid

https://en.wikipedia.org/wiki/Earth_ellipsoid
Earth ellipsoid – Wikipedia
An Earth ellipsoid or Earth spheroid is a mathematical figure approximating the Earth’s form, used as a reference frame for computations in geodesy, astronomy, and the geosciences.Various different ellipsoids have been used as approximations.. It is a spheroid (an ellipsoid of revolution) whose minor axis (shorter diameter), which connects the geographical North Pole and South Pole, is …

https://gisgeography.com/ellipsoid-oblate-spheroid-earth

https://gisgeography.com/ellipsoid-oblate-spheroid-earth
Our Oblate Spheroid Planet Earth – GIS Geography
10 mars 2024We say Earth is a sphere. But it’s not exactly a perfect one. It’s an oblate spheroid that bulges at the equator and is somewhat squashed at the poles. In fact, it bulges about 14 miles out more at the equator compared to pole-to-pole. Because of the field of geodesy, we’ve gained a much better understanding of the shape of our planet …

https://en.wikipedia.org/wiki/Empirical_evidence_for_the_spherical_shape_of_Earth

https://en.wikipedia.org/wiki/Empirical_evidence_for_the_spherical_shape_of_Earth
Empirical evidence for the spherical shape of Earth – Wikipedia
Graphs of distances to the true horizon on Earth for a given height h.s is along the surface of Earth, d is the straight line distance, and ~d is the approximate straight line distance assuming h << the radius of Earth, 6371 km. In the SVG image, hover over a graph to highlight it.. On a completely flat Earth without obstructions (mountains, hills, valleys or volcanos), the ground itself would …

https://en.wikipedia.org/wiki/Figure_of_the_Earth

https://en.wikipedia.org/wiki/Figure_of_the_Earth
Figure of the Earth – Wikipedia
The oblate spheroid, or oblate ellipsoid, is an ellipsoid of revolution obtained by rotating an ellipse about its shorter axis. It is the regular geometric shape that most nearly approximates the shape of the Earth. A spheroid describing the figure of the Earth or other celestial body is called a reference ellipsoid.

https://www.britannica.com/science/spherical-Earth

https://www.britannica.com/science/spherical-Earth
Spherical Earth | Description & Facts | Britannica
Modern satellite imagery and measurements of Earth’s gravitational field support the notion that Earth is not a perfect sphere but rather an oblate spheroid (that is, a sphere which is flattened at the poles). This shape derives from the way Earth spins on its axis, generating centrifugal force that causes the planet to bulge at the Equator.

https://www.jstor.org/stable/10.4169/mathhorizons.21.1.25

https://www.jstor.org/stable/10.4169/mathhorizons.21.1.25
Euler and the Flattening of the Earth B – JSTOR
than an inverse-square law, the shape of the Earth might be a prolate, rather than an oblate spheroid. The Flattener of the Earth The French Academy of Sciences eventually decided to settle the controversy by comparing physical mea-surements of a degree of latitude near the equator and near the North Pole. Here is the academy’s reasoning.
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