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If you sit down to think about the vastness and secrets of this universe, where the human intellect is stunned, then the awe of the creator of this vast universe, the Great and Glorious Allah, who is the creator of this entire universe and its everything.
For centuries, the human intellect has been active in uncovering the secrets of this universe and estimating its dimensions. In spite of so many efforts, man has neither been able to measure this universe nor has been able to uncover each of its secrets. After so much hard work, we have managed to reveal only a few knots. One of them is that the existence of our earth in the universe is only as much as a grain of sand in the desert.
If the earth is observed from a satellite, it looks round and the fact is that not only our earth but all the planets or stars that exist in space are round in shape. Have you ever thought that Why are they round in shape? If you have ever wondered this but never got a satisfactory answer, then let us explain it to you in detail.
While discussing this topic, I am reminded of Newton's observation of the falling apple which led to our discovery of gravitation. It is a force that pulls any two bodies towards each other. It exists in the body, whether it is small or big, whether it is stars or planets in space. Gravity exists in every body.
The purpose of telling you about gravity is that it is the force that causes all bodies on Earth and in space to be spherical. If the gravity of a matter increases so much that the gravity of another celestial body is unable to pull it towards itself, then we can call it a planet and it can maintain its balance in space because of its own gravitational force thats why a planet spin in his axes.
A planet's gravity pulls all its matter toward the center of the planet, much like the spokes in a bicycle tire can be likened to a gravitational force. Similarly, gravity pulls every part of the planet towards its center, which keeps its shape almost round.
