It is very appropriate to use a blue marble to describe our earth, its mass is about 60 trillion tons, which sounds particularly heavy, but if you compare the earth with other planets, the earth is a bit small, there is no comparison at all, and there are many planets that are much larger than the earth in the universe.
However, the earth has carried countless miracles of life, giving us an environment to live in, and this blue marble planet is not alone in this universe.
So the question is, why wouldn't a planet weighing 60 trillion tons be pulled away by the abyssal gravity in the universe and fall into that endless darkness?
No matter how strong the gravitational pull of the universe is, the earth can maintain a stable orbit in the universe so freely.
The earth is the home of our human beings, and it is also the planet we first understood, after the continuous development of human beings, we are no longer like the ancients, only know the round sky, with the deepening of the understanding of the earth, we know the diameter of the earth, weight and other data.
As we all know, the earth is a rocky planet, and its overall weight is also very amazing, reaching 60 trillion tons, and the heavier objects on the earth will naturally fall downward, but why can the earth always float in space and not fall down?
We all know the concept of gravitation, the reason why we can stand on the ground, and the reason why objects will fall down, is mainly because of the gravitational effect of the earth, do you know that the center of the earth is the core, so everything on the earth is attracted by the core, so we can stand firmly on the earth.
But once we get to a place where there is no gravity, our whole person will float, like leaving the gravitational force of the earth and coming to outer space, then we will float weightlessly, because we have been free from the instantaneous force of the earth regardless of distance.
And the earth is a planet that revolves around the sun, and it is also attracted by the sun's gravity, just like the moon orbits the earth, all because of the effect of gravity and magnetic field, allowing them to orbit in their own orbits.
You must know that the sun is the main body of the solar system, and the gravitational pull of the sun is very huge, so why don't we fall directly to the sun, or be sucked away by the gravitational pull of the sun?
In fact, there is a reason for this, because the earth we are on is also rotating when it is attracted by the sun, and the centrifugal force generated by it itself makes us not attracted by the sun's gravitational pull, and can continue to revolve around the sun.
There is also a saying that the rotation of the earth produces a centripetal force, yes, things on the surface of the earth can remain stable and will not be pulled out of the earth by gravity, so these two states will not let the earth fall into the sun, let alone fly out of the solar system.
In addition, in the vast universe, it is full of all kinds of matter, which also causes the earth to move in the universe by the gravitational pull of other celestial bodies, such as the gravitational pull from the planets, the gravitational attraction of stars, the gravitational attraction of various galaxies, and so on.
These gravitational interactions allow our Earth to maintain a stable state of motion in the universe.
Therefore, the reason why the earth does not completely fall into the depths of the universe, but is suspended in space, is also because it is constantly moving, and is bound by various gravitational forces, and finally can move stably in orbit.
Let's take a look at the mass of the Earth, and you can understand why the Earth is suspended in space and does not fall into the abyss of the universe.
First of all, the mass of the earth's material refers to the sum of the mass of various elements and compounds of the earth's solids, including all the material of the earth's crust and mantle, and secondly, the mass of the atmosphere is also a kind of earth's mass.
Earth's atmospheric mass refers to the total mass of the Earth's atmosphere, from the lower atmosphere near the surface to the outer atmosphere at high altitudes, each layer has a different composition and density.
Although the mass of the atmosphere does not account for much of the total mass of the earth, it has a direct impact on the earth's weather, climate and ecological environment.
In 200 BC, an ancient Greek mathematician used the principle of direct sunlight to calculate the diameter of the earth, and in 1798, the 67-year-old Cavendish calculated the definite number of gravitation by measuring the weight of the earth reached 60 trillion tons.
According to our daily life experience, the reason why the earth can always float in space must be supported by something, otherwise how can it be suspended in the universe, but with the pictures taken by the Hubble telescope, hundreds of billions of stars in the universe are like this, all suspended in the universe.
It can be said that without gravity, the universe would become chaotic, and various celestial bodies would drift around on their own, without any laws to follow.
Therefore, gravitational force is like a baton in the universe, guiding the various celestial bodies to move according to certain rules.