Why is it that the Earth, weighing 60 trillion tons, can be suspended in the universe? Is there really some mysterious force supporting it?
As early as 300 years ago, the famous scientist Newton, after discovering gravity, once again put forward a surprising conjecture, Newton's cannon.
Simply put, if we fire a shell on the ground in the distance, as long as the shell flies fast enough, the shell will not fall on the ground, but will always fly over the earth.
According to calculations, when the speed of the shell reaches 7.9 kilometers per second, then the shell can overcome the gravitational attraction of the earth and move synchronously with the earth.
In the 20th century, Einstein put forward a subversive theory, space-time distortion, which simply means that the celestial body will produce a certain spatial distortion to the outside world.
If the mass of other stars is too light, it will fall towards a massive celestial body, in other words, although the earth is suspended in the universe, it has actually become someone else's satellite, only because it has a certain speed to be safe, and the mass of the sun in the solar system accounts for 99.86% of other stars, which is completely above other celestial bodies.
Later, the discovery of the operation of the solar system also showed that the reason why the earth can be suspended in space is precisely because it has a certain initial speed, like Newton's cannon, and according to scientists, if the earth can fly at a speed of 16.7 kilometers per second.
Then the earth will completely get rid of the control of the sun, but if the speed of the earth is greatly reduced, it will be distorted by the space of the sun, resulting in its own continuous fall towards the sun
Eventually, the Earth will be ruthlessly destroyed by the giant star of the Sun, when the temperature on the Earth will soar to 3,000 degrees, and all the animals and plants will be in the sea of fire
The fate of humanity will also become unpredictable.