Why does the sun, which weighs 200 billion billion billion tons, still be suspended in the universe

<> using the Earth as a reference system, the ascension of an artificial earth satellite is the process of deploying a stationary object to a designated orbit around the Earth. At the end of the launch, as long as the satellite has a certain initial velocity at a certain altitude, the satellite will finally fly stably along a definite elliptical orbit under the action of gravitational force, which is the result of strict mathematical deduction. If air resistance, the sun, moon and other interference factors are ignored, the satellite's flight orbit is very stable, and nothing needs to be done to maintain this orbit.

The ISS also has more than four hundred tons, why not fall down? Because there is a gravitational pull that allows it to fly steadily in orbit. The sun does not fall towards the center of the Milky Way because of the gravitational pull that exists between the Milky Way and the Sun.

There is no direction in the universe at all, the direction is only defined by human beings themselves, for example, you stand at the North Pole, I stand at the South Pole, we both think that we are upward, but for each other we are indeed headed downward, does this explain clearly?

Because of the gravitational pull of the earth, it keeps you firmly on the ground at all times. This gravitational pull is also true for the universe, and the interaction between all the stars keeps them in dynamic equilibrium, that is, they are suspended in a certain area and rotate in a certain orbit, but this does not mean that the stars are not "falling" in a certain direction. Because our human horizon has not yet broken through the observable universe, maybe the universe that we think is unreachable is just a speck of dust in another dimension, which is falling in a certain direction, which is really very possible, and the infinite universe space that we humans think is very likely to be small and insignificant for another dimensional space.

There is no such thing as an up, down, left, or right universe. So it doesn't matter, fall or don't fall. Although the Sun is heavy, it is only a small star in the Milky Way, controlled by the gravitational pull of the entire galaxy.

All the stars in the universe are suspended in the sky.

Because the earth has a gravitational pull, the sun always moves in a fixed place, so it will not fall into the universe.

Due to the presence of gravity, gravity has an effect on many planets, including the Sun.

In the universe, whether it is our earth itself, or the more massive sun, or the stars in the night sky (most of which are larger than the sun visible to the naked eye), or even galaxies with a mass of trillions of times the sun, they are all suspended in space. The reason why celestial bodies do not fall and can float in space is simply that there is no such thing as a "below" place in the universe, which is completely different from what we perceive on Earth. However, this still does not explain the real reason for the suspension of celestial bodies.

Although the weight of the sun is already very large, the gravitational pull in the universe is also very strong, so it can control the sun in the universe.

Because the sun has a relatively large force, is affected by clouds, and is affected by the upward pressure, each star has a meaning and value for existence.

Under the influence of gravity, all celestial bodies are in motion, and a celestial system is formed. The first is the celestial system composed of the Earth and the Moon, the Moon revolves around the Earth, and it has a tendency to crash into the Earth all the time, but gravity provides centripetal force, and it cannot fall. In the same way, the Earth revolves around the Sun, and within the solar system, the Sun is the core celestial body.

In the same way, the Sun also moves around the heavier center of mass with the eight planets and a large number of asteroids, dwarf row bonds, comets, and celestial debris. The solar system is located on one of the spiral arms of the Milky Way, and the distance from the galactic center is about 10,000 light-years, and it is moving around the galactic center at a speed of 240 kilometers per second, about 100 million years to circle the galactic core. It is not so much that the sun floats there, but that the sun has a tendency to impact the galactic heart with the entire family, and the so-called lower here is pointing in the direction of the center of the Milky Way.

The main reason is that everything in the universe is mutually restrictive and mutually influencing, and there is both gravity and repulsion between them, so they are in a state of relative equilibrium.

Because it has a gravitational pull, it is attracted to each other with other planets, and only mutual attraction will keep it from falling in that position.

In the universe, there is no distinction between the upper and lower and the left and right, and there is no gravity in the universe, and gravity is generated by the gravitational force of the planet, so it cannot be said that the sun floats in the universe.

On Earth, there is a common judgment for people: everything in heaven and earth falls to the ground. For example:

Apple will always fall from the branches. In that case, why is it not so easy for the earth to fall? In 1968, the astronauts of Qiangshi 8 took a photo of the Earth in orbit around the moon, and in **, we can see very clearly that the Earth is floating in space.

There are also some similar photos, such as: in 1990, when Voyager 1, 6.4 billion kilometers away from Earth, took a photo of every star in the solar system, and finally made a family portrait of the solar system**. In Zhang's family portrait**, we can see that the stars in the planets of the solar system are floating in the universe.

But I don't know if you have thought about it, why everything in the heavens and the earth falls on the earth, but the stars in the universe, including the earth, are floating in the universe? Keep in mind that there are 6 billion billion tons of the Earth, and the mass of the Earth is many orders of magnitude higher than the weight of humans combined, so it stands to reason that it will fall as well.

Experts and scholars in ancient Greece once thought about this situation, and Hegel made it clear that everything on the earth (under the moon) is composed of water, fire, earth, and air, and the matter in the universe (above the moon) is composed of Ethereum. In modern times, Aristotle's ideas may be a bit unrealistic. So how did you solve this problem after that?

Newtonian mechanics and the law of universal gravitation Ancient Greek culture previously obtained geocentrism with the development trend of Hegel's theory, and to the European Renaissance, Copernicus and other development trends came out of heliocentrism. But in the end, it was Galileo, Kepler and Copernicus who laid the foundation for meteorology. Copernicus, in particular, gave Newtonian mechanics and the laws of gravitation, succeeded in unifying the laws of physics on earth and in the universe, and did a good job of solving the problem of floating on earth in the universe.

According to Newton's first law, force is the main reason for changing the motion of an object, and if there is no force or the net force is zero, the object will either maintain a uniform linear motion or remain stationary. Therefore, we can get a result: the fundamental reason for the fall of objects on the earth is the action of a force, which is the law of gravitation and the cohesive force, which we also call this co-force

Effort. The direction of the force is exactly vertically downward, so the direction of "down" in "landing" is essentially the direction of the force.

Because space is a weightless environment, the Earth is not affected by gravity in space, so the Earth can be suspended in space.

The first point is that it can float in space because it has a special buoyancy in the whole universe, and the second point is that it is normal for the earth to float in space, because there are many planets in our entire space, and the earth is only one of the planets.

This is all due to the gravitational force, which is mainly due to the gravitational pull of the sun, which causes the earth to revolve around the sun.

Our daily experience is that the earth with such a large mass must be held up by something, otherwise it will definitely fall. But over the years, images of the Earth taken from space have shown that it appears to be suspended in space. In addition, Hubble's images of the solar system and other objects in galaxies containing hundreds of billions of stars are visually suspended in space.

Therefore, the reality of the cosmic balance collides with the common sense that human beings take for granted. Earth floating in space? The most intuitive feeling is to stand on the ground divided into two points, up and down, with a sense of direction.

1. Air density.

The ground under your feet is downward, and the sky above you is upward. Throughout the day, we see objects that are denser than air falling to the ground. So we have summarized such a law:

Heavy objects are bound to fall from high to low. Why is that? Because of the presence of gravitational force, there will be a gravitational force between two mass objects, and the Earth will attract all the objects within its gravitational range; The Earth is the cradle of human life and one of the eight planets in the solar system.

After a long period of cosmic exploration, we have not found any life on other planets for the time being, so as far as we know, the Earth is the only planet in the solar system that has life.

Second, the mass of the sun.

It is the most massive, diameter, and dense terrestrial planet in the solar system. In addition to Earth, Mercury, Mars, and Venus are also terrestrial planets. At present, the desire of mankind to explore Mars is the strongest.

Anyone who has studied basic physics knows that an object always remains at rest or moves in a straight line at a uniform speed until it is subjected to an external force. At this moment, the earth under our feet is revolving around the sun at a speed of 30 kilometers per second, which can be said to be sitting on the ground for eight times a day. From the point of view of physics, objects on Earth are attached to the ground.

3. Detailed introduction.

Because the center of mass of the earth is at the center of the earth, the object is attracted to the center of the earth. So, on Earth, we can stand firm. Our bodily organs tell us our sense of direction, and objects with a large mass will fall to the ground under the force of gravity.

The basic structure of the earth from the inside to the outside is the core, mantle, crust, hydrosphere, and atmosphere. It is speculated that the Earth was formed by the gravitational collapse of a cloud of hydrogen molecules hundreds of millions of years ago. After the collapse, it formed a solar system with the sun as the center and the surrounding planets surrounding the sun.

In terms of distance from the Sun, the Earth ranks third. Like other planets, the Earth not only orbits around Taipei, but also rotates continuously, with a rotation period of about 23 hours and 56 minutes.

Because while the earth is affected by the gravitational pull of the sun, it also has a tangential velocity that is wide and straight in the direction of gravity. This speed is proof that the Earth has been missing the Sun and will not collide with the Sun when it falls towards the center of the Sun.

It should be the gravitational effect between the planets. In the end, the earth was kept in a state of equilibrium, so that it could operate normally in orbit.

It is because the earth is affected by the gravitational pull of the sun, so the earth has been revolving around the sun, and the earth has been moving according to the geodesic line.

Because the universe is boundless, has no beginning and no end, it is unlimited.

The reason for the occurrence of gravitational force (brief description): When the high-energy particles moving in the universe pass through matter (celestial bodies or particles), part of them are intercepted and absorbed to form a weak energy region (Einstein's space-time curvature), which is the gravitational range mv2=e=mv2 (the formula of the law of conservation of energy conversion). For more details, please see the forthcoming gravitational hypothesis, "Elemental Periods and the Causes of Gravitation".

Because the space of the universe is fixed, the earth can only be suspended in space, and this is also because of the effect of gravity.

Because the Earth is in a vacuum, there is no gravity, and there is no concept of up and down, it is able to levitate in space.

The Earth is huge for us, but it is quite small for the entire starry sky, and each planet has its own trajectory in space, so it will be suspended in space.

Who is holding up the planet? Our daily experience is that the Earth must be made of something of this mass"Hold it up", otherwise it will definitely fall, but over the years, images of the Earth taken from space show that it"Like"Suspended in space. In addition, Hubble's images of other objects in our solar system, as well as galaxies containing hundreds of billions of stars, are visually so"Suspension"in space.

Therefore, the reality of the universe is taken for granted by human beings"Common sense"There was a collision. Earth floating in space?

Anyone who has studied basic physics knows that an object always remains at rest or moves in a uniform straight line until it is subjected to an external force. At the moment, the Earth under our feet is orbiting the Sun at a speed of 30 kilometers per second, which can be described as:"Sitting on the ground drives 80,000 miles a day"。From the point of view of physics, an object on the earth is attached to the ground, and because the center of mass of the earth is located at the center of the earth, the object is"Attract"to the center of the earth.

<> Einstein's general theory of relativity, from the end of the 19th century to the beginning of the 20th century, with the deepening of physics to the microscopic world and the expansion of the macrocosm, Newton's law of universal gravitation, which is only applicable to low-speed macroscopic motion, began to show errors, and the guide chain Bixin caused a series of problems that physicists could not solve at that time, including the perturbation of Mercury's perihelion. Common sense tells us that no object, no matter how heavy or small it is, can be suspended in the air for no reason. The heavier an object is, the faster it will fall from the air and the harder it will be to float in the air.

Nothing on Earth can violate this law, but interestingly, the Earth itself seems to contradict it. The Earth we live on is a rocky planet weighing 6 trillion tons, but it can remain suspended in space and never fall. Why is Huizhao like this?

This seemingly mysterious problem can only be explained by the application of classical mechanics. When it comes to falling objects, one of the first issues that needs to be addressed is how to define the direction. On Earth, the direction of up and down is very clear, whether we are in the Southern Hemisphere or the Northern Hemisphere, the direction of our feet is downwards and the direction of our heads is upwards.

There is no dispute at this point.