The Round of the Earth is Slow, This is the proof

In the 1690s, astronomer Edmund Halley discovered the problem.

Halley was a good friend of Isaac Newton and a few decades earlier he advocated Newton to publish a monumental piece entitled "Principia." In the work, Newton reveals that "gravitational force" is universal.

Newton's work enabled Halley and his friends to make astonishingly different predictions of astrology, including the prediction of timing the total British solar eclipse in 1715. His prediction only missed 4 minutes.

Halley then examines the historical records of the solar eclipse available to him. The record dates back thousands of years, collected by astronomers commissioned by Chinese emperors.

Well, the problem is because not everything fits.

As quoted from Space.com on Friday (18/08/2017), the calculations of the ancient eclipses differ from the historical records.

The more Halley reads the records of the past, the greater the recording difference - even to the point of missing thousands of years.

Generations of astronomers and physicists later found the answer. True, the Earth's rotation is slowing and the Moon is getting away. And both are related to the sea surface side.

The moon raises the sea tides on the opposite side of the Earth, but the Earth spins so that the ocean tides slightly precede the position of the moon in orbit. So, viewed from the moon, as if there was a bunch of water in front of him.

The gravitational pull of the water set acts like a rope dragging the moon and throwing it into a higher orbit. As a result, the Earth loses less energy and slows down.

We see this process happening everywhere in our solar system. The end result is the locking of the sea tide when the same side of an object always faces its orbital pair.

This has been going on for months so long that the moon always confronts the same side to Earth.

Pluto and its largest moon named Charon are already locked up. Likewise with other small moons orbiting the giant planets in our solar system.

The tidal interaction of Earth and moon is not too big. We part with a speed of only 3.8 centimeters per year.

But, as the decades, centuries and millennia progress, the size of the moon's visibility shrinks until the total solar eclipse gets scarce.

In the end, after 620 million years, the moon will look too small in space so it can not completely cover the sun. At that time, the total solar eclipse did not happen again.

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