Sunday, 20 March 2016

Why do the planets circumvent the Sun?

Some visitors to the Teens Science Hall and Rauch Planetarium at the University of Louisville in Kentucky recently asked why the planets go around the sun. Most people take this fact for granted, but the answer involves many interesting and important concepts ideas. I will touch on a few.

First and foremost, saying the planets going around the sun is just another way of saying the planets in orbit around the sun. A planet orbiting the sun like the moon or the NASA satellite orbiting the Earth. Now what planet revolves around the sun, not the sun revolves around the earth? Lighter object orbiting a heavier one, the sun is, by far, the heaviest object in the solar system. The sun is 1,000 times heavier than the largest planet, Jupiter (who also happens to be my favorite planet), and it is more than 300,000 times heavier than the Earth (another planet I am very fond of). In the same way, the moon and satellites launch the Earth's rotation because it is so much lighter than our planet.



But now we still have the question of why anything is about something else. Complex reasons, but provided the first good explanation on the part of one of the greatest scientists ever, Isaac Newton, who lived in England about 300 years ago. And it was well known when he was alive, and being admired a lot of people to answer some of the most difficult and fascinating scientific questions of his day, but I'm sorry to say it has a long life in general was not happy. I wonder how he felt to know that even hundreds of years after his death, and is widely said to be one of the most brilliant scientists, is important, the product ever to have lived.

Newton realized that the reason why the planets revolve around the sun Why associated things fall to the ground and when we drop them. Attractiveness of the sun pulls on the planets, just as the Earth's gravity pulls down anything that is not held by some other powers, and keep you and me in the ground. Heavy objects (really, they are more massive) produces greater than lighter ones attractive, so a heavy weight in our solar system, the sun is practiced stronger attraction.

Now, if the sun is pulling the planets, why do not you just fall in and burn? Also, in addition to the fall toward the sun and the planets are moving sideways. This is the same as if you have a weight at the end of the series. If you swing around, you pull it down toward your hand, just as the gravity of the sun pulls the planet, but the movement and keep the side of the ball swinging around. Without lateral movement, it falls to the center; and without pulling toward the center, it will go flying off in a straight line, which is, of course, is exactly what happens if you leave the series.
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