Humans initially thought that the ground we live on is stationary and that it is the sky that is in motion. People imagined that the sky is a ball, half day and half night, and it just turns over there every day. Then people realized that we live on a ball, but it does not turn, what turns is the sun, which revolves around the earth, hence the day and night.

There was a scientist named Copernicus during the Renaissance who suggested that it was possible that the center was the sun and that the center of rotation was the earth we live on. This theory was a slap in the face of the church, how could they allow such a statement to exist? So this doctrine was suppressed as never before. But the astronomical fire was lit, and the earth has moved ever since!

Earth rotation

Earth is the third planet in our solar system and the only planet with life in our solar system. It revolves around the Sun at a distance of 150 million kilometers, taking about 365 days, while it also rotates on its own, with a period of about 24 hours. Whether it rotates or revolves, the direction is from west to east, so on Earth, the sun rises in the east and sets in the west.

The circumference of the Earth's equator is 40,000 kilometers, even if a person standing on the equator where not to go, he can "walk" a distance of 80,000 miles. So strictly speaking, there is no absolute stationary object on Earth, even Mount Everest, it is also moving every day. This calculation, the equatorial object speed is the fastest, converted to a speed of 460 m / s.

Bolt, the fastest runner among humans, when the world record speed of 10.4 m / s, so look, to the equator, per capita beyond Bolt. So why is it that people at the equator do not have the feeling that they are in motion?

Because human beings live on the earth, belong to the earth as a whole, if you want to look at human beings and the earth separately, you need a reference. However, as far as we can see, all the objects on the Earth belong to the same reference system as humans, and they are integrated as one and cannot be used as a reference. Humans can only be separated from the Earth into space to strip us from the Earth's reference system, so we have no way to perceive that we are following the Earth's movement.

It's a bit of a pity to say so, it's faster than even Bolt, and it's too bad that there's no way to feel it. Do not pity too early, in fact, the Earth's speed is much more than 460 m / s, but in the 600 km / s super fast speed across the universe.

600 km / s, which is faster than the three cosmic speed, there is this speed, human beings have long left the solar system interstellar travel, how can still be bound to the Earth on this speed unaware of it? The reason is very simple, from the force analysis, we and the Earth has become a whole, can not be divided, so relative to the Earth, we are stationary, but relative to the universe, no object is always stationary. So, how did this 600 km speed come about? After all, the speed of the Earth's rotation is only 30 kilometers per second.

Rotation from the Milky Way

This speed comes from the rotation of the sun. What? The sun revolves? In human perception, all the planets in the solar system are revolving around the Sun, a star, the Sun will at most rotate, it is a star, revolving around who? I can only say that the universe is too large, humans are too small, the solar system is only an ordinary and ordinary star system in the vast universe, it has a higher astronomical level than their own - the Milky Way.

The Milky Way galaxy, where the Sun is located, is a barred spiral galaxy, an elliptical disk structure with four symmetrical spiral arms, each 4500 light years apart and about 10 billion years old, according to astronomers. The number of stars in the entire galaxy is between 100 and 400 billion, and there are about 50 or more galaxies in the entire universe. The Sun is so important to the planets, including Earth, that its mass alone accounts for 99.8% of the total mass of our solar system. However, the Sun is only 1.5 trillionth of the mass in its own galaxy, which is so small that it is not worth mentioning.

The entire solar system is revolving around the Milky Way, the rotation period of about 270 million years, that is, when the dinosaurs were born when the solar system began to rotate, and when it finished its rotation, not only the dinosaurs have become extinct, even whether humans will continue to exist on Earth is an unknown. So, the sun's rotation period is so long, the speed should not be very fast? Wrong, the speed is beyond human imagination, reaching 220 kilometers per second, what the first, second, third cosmic speed in front of it is a brother.

We know that rotation comes from the gravity of the central object, for example, the Earth's rotation comes from the gravity of the Sun, because the Sun is so massive and gravitates so strongly that it is surrounded by not only the eight planets, but also the asteroid belt, the Kuiper Belt, and the enigmatic Oort Nebula. So where does the Sun's gravity come from as it revolves around the Milky Way?

Silver Heart Black Hole

According to astronomers, our galaxy, the Milky Way, has a huge black hole at its center, Sagittarius A*, which is part of Sagittarius A and is most likely the closest black hole to us in the entire universe. Sagittarius A* has a diameter of only 44 million kilometers, a very small distance, so small that Mercury is 46 million kilometers away from the Sun, which means it could be placed between Mercury and the Sun. However it is better not to put it, its mass is above 4 million solar masses, and when it is put down, the whole solar system does not want to exist.

We all know that black holes are the graves of some massive stars, and it is likely that Sagittarius A* was a star with a mass greater than at least 8 suns during its lifetime, and after completing its main sequence star, it consumed its hydrogen and collapsed internally, thus exploding in a supernova, throwing out its shell and leaving only this massive core.

This collapse will last for billions of years or even longer due to its huge mass, and the gravitational force generated by the collapse crowns the entire universe, thus no matter can escape from it, not even light. The enormous gravitational force of the black hole is felt by the solar system, which is 25,000 light-years away, so that under this enormous gravitational force, the solar system begins to revolve around it at a speed of 220 km/s.

Cosmic expansion

But did not say before, our Earth is in constant motion in the universe, with a speed of 600 kilometers per second? But now the solar system is revolving around the Milky Way at a speed of 220 kilometers per second, which is already very fast, but still far from 600 kilometers. I'm afraid that this speed also includes the expansion of the universe, our earth moves too much, both to revolve around the sun, but also with the sun around the galaxy, and beyond this, there is the expansion of the universe, the earth is also within this expansion system together with the expansion.

According to astronomers' estimation, the age of the universe is about 14 billion years, but the diameter of the universe is more than 96 billion light years, because the universe is constantly expanding. Our universe is like a balloon, and all the stars are like ants on the balloon. The balloon keeps expanding and the ants are moving away from each other, and if the speed of the ants' travel cannot catch up with the speed of blowing up the balloon, then theoretically the ants can never find another ant.

By analogy, the stars in the universe are actually moving away from each other, and the speed of moving away can be understood as the speed of expansion. If we launch a spaceship towards these stars and the speed of the spaceship is not greater than the speed of expansion of the universe, we will never reach them.

Since it is "blowing up a balloon", where does this "air" come from? What energy is causing the universe to expand? The astronomical community generally agrees that the creation of the Big Bang, that the universe began about 15 billion years ago in the Big Bang. Before the explosion, the universe was just a point, without time and space. After the explosion occurred, hydrogen atoms were created, which began to form the original world of particles. The explosion produced a huge amount of energy, the new birth of the narrow universe can not accommodate it, and was "expanded", the explosion became the energy to blow the universe "balloon", until today, this force is still working tirelessly to "blow balloon".

So, what is the speed of this expansion? At present, humans have no effective means to measure the speed of the expansion of the universe, but only according to speculation. Some astronomers believe that the speed of expansion of the universe exceeds the speed of light, according to is the diameter of the universe now, because according to the speed of light growth, the size of the universe should be 14 billion light years, now grows to 96 billion light years, indicating that the speed of light can not catch up with the expansion.

However, some astronomers believe that the universe did expand faster than the speed of light in the initial period, but as the space of the universe keeps getting bigger, the density of the universe is decreasing, which will slow down the expansion. Therefore, this expansion speed range is very large, with a minimum of 70 km/s and a maximum of no limit. The Earth belongs to the universe, and it is gradually moving away from the stars in this expansion, including the Sun, on which it depends, at a speed of at least 70 kilometers per second.

The possibility of cosmic travel

We already know that the Earth itself rotates, and that the solar system in which the Earth is located orbits the black hole at the center of the galaxy, and that the Earth naturally belongs to this system of motion and has the speed of the solar system's rotation. In addition to this, the universe is expanding, and as a part of the universe, the Earth is naturally not escaping the expansion, and it is moving away from nearby stars at speeds we cannot calculate. Ignoring the direction and adding up these speeds, it is entirely possible that the Earth is moving at more than 600 km/s.

This speed can not catch up with the speed of light, can not make the surrounding space-time distortion, but for interstellar navigation has been enough, humans are also considered part of the Earth, can we use these gravitational forces, as the energy to travel through the universe to achieve it? Theoretically it is possible, provided that it must be out of the system of the sun.

The reason why we are oblivious to the super-fast motion of the Earth is that man belongs to the Earth and is in a state of relative rest with the Earth. If mankind escapes from the Earth and becomes part of the solar system, he can use the gravitational force of the Sun to achieve a rotation of tens of kilometers per second. If humans escape from the solar system and become part of the galaxy, using the gravitational force of the silver-centered black hole, then the speed can reach several hundred kilometers per second.

But the problem is that we can easily get out of the confines of the Earth, but it is very difficult to get out of the solar system. The farthest human probe is Voyager, which is still in the Kuiper Belt where Pluto is located, and we do not know about the space beyond.

So far, mankind has not left the solar system completely. Our probes can easily reach the third cosmic speed, the diameter of the solar system is about 30 billion kilometers, and the boundary has not been determined, to leap out, it will take a long time, with the current technology, it will take several generations of human beings to wait.

The future is promising

In the entire universe there is no absolute static stars, all matter is moving at a great speed, easily hundreds of kilometers per second, not to mention the fastest speed of light. There is no absolute, but relative, we and the Earth is a relative static existence, therefore, all the movement of the Earth's universe, we can not perceive. No wonder, a thousand years ago, mankind will think that the Earth is the center, and the species is eternal, because the history of mankind is too short, coupled with the constraints of the technology at the time, shorter vision is unavoidable.

Now we know that the Earth has a super-fast movement and try to take advantage of this speed, to take advantage of it, you have to leave the solar system, disappear into the galaxy and become a class alongside the solar system, which is almost impossible for humans who are still small. Of course, do not give up so easily, when people still think that they can never leave the Earth, it turns out that we can, although only more than 500 people have left the Earth. But, flying through the solar system, one day will become a reality, across the universe, can also be!