NECESSITIES - GRAVITY

The wind is behind, the sun is shining, but after having found DJT impressed on a white slate, we need to go back to what is really necessary.

In August 1665, 23-year-old Isaac Newton move to the family farm in Lincolnshire to escape the plague that was spreading across England. On the 18th month spent waiting for the reopening of the university, Isaac, inspired by the fall of an apple (or as the legend goes), associated for the first time gravity to the motion of the moon. For almost twenty years, this initial intuition of the law of universal gravitation was not published, nor presented, nor discussed anywhere.

While Isaac continued his silent struggle to explain the behaviour of gravitational force, Edmond Halley, still didn’t have any answer to how the celestial bodies move.

In 1684 Halley visited the University campus in Cambridge where Newton was living and studying for already thirteen years.

At the question whether he had any mathematical theory regarding the ruling forces between celestial bodies, Newton replied he had found this formula some five years before.

“I deduced that the forces which keep the planets in their orbs must [be] reciprocally as the squares of their distances from the centres about which they revolve”

All that was necessary was finally there: the right time, people, explanations. In 1687, with the example of the “cannon ball”, Newton explained the force of Gravity to the world and lead the future for space exploration.

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