Psalm 89:11
Yours are the heavens, yours also the earth; the world and everything in it, you founded it.
Is the law of gravity discouraging?
The first force you've ever noticed was probably gravity. As a small child, you had to learn to stand up against him and walk. When you tripped, you immediately felt that gravity returned you to the floor. In addition to giving problems to small children, gravity holds together the moon, planets, sun, stars and galaxies in the universe in their respective orbits. It can work at immense distances and has an infinite range.
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Isaac Newton visualized gravity as a pull between two objects that was directly related to their masses and inversely related to the square of the distance that separates them. Its law of gravitation allowed humanity to send astronauts to the moon and robotic probes to the confines of our solar system. From 1687 to the early twentieth century, Newton's idea of gravity as a "tug-of-war" between two objects dominated physics.
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But one phenomenon that Newton's theories could not explain was the peculiar orbit of Mercury. The orbit itself seemed to turn (also known as). This observation frustrated astronomers since the mid-nineteenth century. In 1915, Albert Einstein realized that Newton's laws of motion and gravity did not apply to objects in high gravity or at high speeds, such as the speed of light.
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In his general theory of relativity, Albert Einstein visualized gravity as a distortion of space caused by mass. Imagine that you put a bowling ball in the middle of a rubber sheet. The ball makes a depression in the blade (a gravity well or a gravity field). If you roll a marble towards the ball, it will fall into the depression (it will attract the ball) and may even surround the ball (orbit) before it hits. Depending on the speed of the marble, you can escape the depression and pass the ball, but the depression can alter the path of the marble. The gravity fields around massive objects like the sun do the same. Einstein removed Newton's law of gravity from his own theory of relativity and showed that Newton's ideas were a special case of relativity, specifically one that applies to weak gravity and low speeds.
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When considering massive objects (earth, stars, galaxies), gravity seems to be the most powerful force. However, when you apply gravity to the atomic level, it has little effect because the masses of subatomic particles are very small. At this level, it is actually degraded to the weakest force.
Thanks to @sirknight for the #celestialchallenge.
• Sunday - Light
• Monday - Darkness
• Tuesday - Animal Kingdom
• Wednesday - Structures
• Thursday - Forces in Nature
• Friday - LoveBeauty Freedom
• Saturday - Agriculture
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