![]() ![]() While Newton may not be the first person to think about gravity, he was the first to develop a sweeping explanation about it using a new form of mathematics called calculus that he himself developed. Newton, who had arrived at his discoveries by mathematical analysis, also pointed out that the same gravitational forces act between the moon and Earth and between the sun and comets. Pluto, being the outermost planet in the solar system, experiences a weaker pull and so takes the longest time to complete one revolution. For this same reason, the farther away a planet is from the sun, the slower it travels along its orbit. This distance, combined with the planet’s momentum, is enough to weaken the sun’s gravity and prevent Mercury from falling into the ball of fire. Mercury, despite being the nearest planet to the sun, is still 70 million kilometers away from it. As a result of this pull, Mercury is the planet that goes the fastest along its orbit.Ĭonsequently, Newton says that the reason the planets do not fall into the sun is that gravity weakens as the distance between two objects increases. Because Mercury is the nearest planet to the sun, it is the planet that experiences the strongest pull. The nearer an object is to the sun, the stronger the sun’s pull on that object. The Newton Crest: 1976-1976: The first Apple logo was designed in 1976 by Ronald Wayne, sometimes referred to as the third co-founder of Apple. The sun is the most massive body in the solar system, and so it exerts the strongest gravitational pull on the planets. Gravity, according to Newton, is also the reason planets orbit the sun. ![]() He adds that a massive object has a stronger gravitational force than a less massive object.Įarth is much more massive than an apple and exerts a greater gravitational force, so apples fall to the ground instead of floating in mid-air or upwards to the sky. Discover Newton's Apple Tree, Trinity College in Cambridge, England: This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity. He says that the force of gravity between two massive objects is stronger compared to the force of gravity between two less massive objects. Newton explained the connection between apples and planets in his book, Mathematical Principles of Natural Philosophy.
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