All celestial bodies have their own gravitational force, including planet Earth. It is thanks to this force that a strict order is maintained in the Universe, celestial bodies remain in their orbits, satellites revolve around planets, and planets - around their stars.

Gravity of small celestial bodies has its own opposite effect on large ones - for example, the ebbs and flows of the earth occur on Earth precisely thanks to the moon satellite. People and objects remain on the surface of the Earth also due to the force of its attraction - gravity. The force of gravity is very interesting to study, and therefore it is definitely worth talking about some things.

Gravity and scientific facts

You can hear the common assertion, indicating that the astronauts who are in space at their stations do not experience any gravity. It is worth refuting this statement: they are exposed to microgravity, together with the ship, which is influenced by the attraction of the Earth and other celestial bodies. At the same time, the effect of gravity is not dual, this force does not give a reaction, carrying out exclusively attraction. It is also worth clarifying other points:

• Each planet has its own gravity. So, for example, if you take Jupiter, then here the weight of any object will be 2.3 times more than on Earth;
• Despite all the power of gravity, which holds heavy objects on the surface of planets, preventing them from falling into open space, and the fact that it maintains the order of celestial bodies in the Universe and their movement, it is the weakest of the four fundamental forces. Electromagnetism and both types of nuclear interaction manifest themselves much more powerful;
• Going into space, the ships overcome the force of Earth's gravity. To do this, they need to maintain a speed of at least 11.2 kilometers per second;
• Scientists are trying to create a gravitational beam that would allow objects to move non-contact, but so far no significant practical results have been achieved in this direction;
• But to overcome this powerful force can an ordinary magnet that hangs on a metal object. He does not fall, and therefore overcomes gravity.

Other interesting facts about attraction

Gravity was discovered by Newton, and many people know a funny legend about how an apple fell on his head. In fact, this was not so. The scientist simply watched the process of falling an apple, and then thought about the fact that the moon should be attracted in exactly the same way. In further reflection, his amazing discoveries were born. The word “gravity” itself has a Latin origin and translates as “heavy”. And also worth noting the following:

• Gravity extends to unlimited distances, with distance from the object, it only weakens, but does not disappear completely. It will disappear only if, on the other hand, the object acts, and the effect has the same force, then gravity is naturally canceled;
• Gravity can distort time and space - that is what Einstein thought.When considering his theory of relativity, gravity will appear as a curvature of time and space;
• There is no place for gravity in quantum mechanics, although all three other forces appear there. In practice, it turns out that when gravitational forces are included in the equations, they become incorrect. This paradox is still not resolved.

Thus, the force of gravity, or gravity, still hides many mysteries - despite the fact that everyone can feel it in action constantly. And it is being explored, opening new horizons for scientists.