- Feb 25, 2016
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I also have a "vehement almost fanatical defense" of a round earth, and a heliocentric solar system. Neither Jesus nor the Apostles mentioned round-earthism or heliocentrism--so is it wrong of me to defend a round earth and a heliocentric model against those who say the earth is flat or that the sun moves around the earth?
Or is it only a problem when I defend the science you personally don't agree with?
-CryptoLutheran
I agree with the heliocentric Earth model and with the round Earth model. But don't let the simplified charts fool you.
One thing to keep in mind, however, is that planets and stars rotate around a common center of gravity.
In short, they are in a dance like two ends of a dumbbell with the distances between the dumbbell heads varying according to the differences in mass which affects their gravitational relationships. The effect on the star, including our sun, is that of a slight wobble which sensitive instruments on Earth can detect and mathematically analyzed so that the resulting data indicates the presence of the planet or planets involved, distances and relative masses. That is one way in which exoplanets are discovered.
To help us better imagine the true dynamics of the orbital relationships we have to recall that the sun itself is in orbit around the Milky Way's galactic hub. Which means that the planets are forced to keep up with the sun as it orbits the galactic center which is approx. 26 million light years away. All these motions are depicted as perfectly circular for instructional purposes by basic astronomy solar system charts but there are other charts which depict them more accurately but which are far more difficult for us to envision.
Orbital motions simplified:
So yes, I accept the heliocentric view.
But maybe not in the way you might be accepting it.
Round Earth? Yes, I accept it. But I also keep in mind that the planet Earth isn't perfectly round. It is an oblong. The reason that it is an oblong is because its 1000 miles per hour rotation rate at the equator causes it to produce a bulge an so it seems a bit flatter at the poles that it does at its diameter. So there again we are in agreement but maybe with a slightly different perspective.
Oblate Spheroid
Oblate Spheroid
The Earth's True Shape
The Earth is not a perfect sphere. Due to it's rotation, the Earth (like all rotating planets) has a slightly distorted shape. The rotational momentum tends to force the matter to bunch up in the middle. In the case of the Earth, this "middle" is the equator.
Oblate Spheroid
The true shape of the Earth called an Oblate Spheroid. The term "Oblate" refers to it's slightly oblong appearance. The term "Spheroid" means that it is almost a sphere, but not quite. One of the most important things to remember about the Earth's shape is that it is only very slightly oblate. The diameter from the North Pole to the South Pole (the shortest diameter) is approximately 12,714 km. The equatorial diameter (the longest diameter) is approximately 12,756 km. This is not a big difference, but it does
http://regentsprep.org/Regents/earthsci/units/introduction/oblate.cfm make the Earth not quite a sphere.
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