Bright Sword starts with the grenade flat.

Chapter 270 Six Cosmic Speeds
Of course, the time it takes to accelerate out of Blue Star's orbit is not very fast. After all, the overall mass of the space station is here, so this stage of accelerating out of Blue Star cannot be completed in one or two hours, but takes several days. Only a genius can complete the acceleration from the first cosmic speed to the second cosmic speed, thereby reaching the speed of leaving the orbit of the blue star.

After all, Liu Xiu's space station for Mars landing can only barely reach the first cosmic speed of 7.9 kilometers per second. If you want to get rid of the gravitational circle of the Blue Star, you still have to use the speed of the space station to reach the point of breaking away from the Blue Star. Raising to the second universe is more than 11.2 kilometers per second. Only after reaching this speed can the gravitational control of the blue star be completed.

Of course, because the moon landing spacecraft launched by Mi'ao was still a satellite of Blue Star, the moon's orbiting speed did not break through the second cosmic speed. Therefore, Mi'o's moon landing rocket actually did not break through the second cosmic speed.

However, it is obvious that landing on Mars is different from landing on the moon. If you want to land on Mars, you must exceed the speed of the second universe, get rid of the control of the blue star's gravity, and then become a satellite of the sun, revolve around the sun, and then enter the orbit of Mars. Captured by the gravity of Mars.

However, there are certain requirements for leaving the Blue Star orbit, although the speed of leaving the solar system only needs to reach 16.7 kilometers per second.

However, this speed is based on the correct direction. That is to say, the direction of the space station landing on Mars leaving the Blue Star must be consistent with the direction in which the Blue Star rotates around the sun. Only in this way can it get the help of the Blue Star, allowing The speed of the space station can be superimposed on the speed of the blue star orbiting the sun.

The superimposed value is the speed at which the space station revolves around the sun.

It's just that this third universe speed of 16.7 kilometers per second is actually the speed obtained using the Blue Star as the reference point.

However, in fact, according to the classification of celestial bodies, there are six velocities in the universe, and they respectively represent the speed of leaving this celestial body system.

And until Liu Xiu traveled through time, the highest cosmic speed that humans could achieve was only the third cosmic speed. And if we can reach the highest level of the sixth cosmic speed, where can humans fly? Then we have to understand the meaning of these six cosmic speeds.

This process is equivalent to escaping from the blue star but there is no complete escape, so it is not an escape velocity.

And if there is no additional force, then the satellite will orbit the sun, upgrade from a satellite to an asteroid, and become an asteroid in the solar system.

The speed of artificial satellites can be faster than 7.9 kilometers per second, but it cannot be faster than 11.2 kilometers per second. If it reaches this speed, it will really leave the Blue Star and become a part of the solar system.

The first is the first cosmic speed, which is the speed at which man-made aircraft can escape the gravity of the blue star and stay in space permanently.

The reason lies in the gravity of the blue star. The way the moon and artificial satellites arrive in their orbits are different. The moon is knocked out, while artificial satellites need to rely on rockets to send themselves into space.

The speed of the satellite at the moment it is launched into space can only be greater than this speed, and cannot be less than this speed, otherwise it will return to the embrace of the blue star instead of orbiting it. This speed is called the first cosmic speed.

For example, they are all satellites. The moon's revolution speed is just over one kilometer per second. However, the man-made satellites we launch must reach at least 7.9 kilometers per second when entering space, otherwise they will not be able to enter the orbit around the blue star. !

This speed is called the second cosmic speed, also called escape velocity. Each celestial body has its own escape velocity, which is related to the mass and radius of the celestial body.

For example, the escape velocity of Blue Star is 11.2 kilometers per second, that of the Moon is 2.4 kilometers per second, and that of Mars is 5 kilometers per second.

The entire solar system is dominated by the sun. If you want to escape its shackles, you must break away from its gravity. Just like leaving the blue star, this also requires a speed, which is called the third cosmic speed. These three speeds are the speeds that humans can achieve with the rocket flight technology currently mastered. However, in addition to these three speeds, there are three speeds. Judging from the technological level in front of humans, they are still far away from them. .

Theoretically speaking, after leaving the solar system, a man-made aircraft is an artificial object in the Milky Way and it will orbit the Milky Way.

The cosmic velocity is also called the escape velocity, so by analogy, the third cosmic velocity is the speed of escaping from the solar system, then the fourth cosmic velocity is equal to the escape velocity of the Milky Way, that is, the minimum speed of leaving our Milky Way to go to other galaxies.

However, it is difficult to obtain an accurate value for this speed, because it is related to the mass of the black hole at the center of the Milky Way and the radius of the Milky Way. Human beings currently do not have exact values ​​for these data.

Because the technology in front of mankind does not know whether there are other black holes and more massive celestial bodies in the galactic center, the speed of the fourth universe can only be estimated.

Taking the revolution of the sun as a reference, yes, although the sun is a star, it also revolves and has its own revolution period.

The sun revolves around the center of the galaxy at an unimaginable speed. It can fly 220 kilometers in one second, surpassing the speed of all its own planets.

The revolution period is even more frightening. The time for one revolution is about 250 million years. This means that the last time the sun was at this position, the end-Permian mass extinction was occurring on the Blue Star.

It can be seen from the revolution of the sun that it must not exceed the escape velocity of the Milky Way, otherwise the sun will continue to move away from the Milky Way.

And according to observations from astronomical telescopes, the sun is actually approaching the center of the Milky Way. However, there is no need to worry about the sun being swallowed by the black hole in the center of the galaxy, because based on the speed of approach, the sun is likely to reach the end of its life before it is swallowed.

It can be seen that if you want to escape from the Milky Way, you must exceed 220 kilometers per second. Although this speed looks scary, don't forget that the speed is actually a reference value.

This is just like using the speed of the blue star's revolution to leave the solar system. We can also use the speed of the sun's revolution around the center of the galaxy, which is a speed of 220 kilometers per second, to obtain the speed of leaving the galaxy.

However, the significance of this is not very great. Even if it uses help, what can it do? For example, the Voyager used the speed of Blue Star, but it still took more than 40 years to fly more than 24 billion kilometers. meters distance.

This is just like the traffic wave Blue Star that Liu Xiu will face next. Even if the Blue Star is equipped with a planetary engine to accelerate the Blue Star to leave the solar system, but even so, it still takes two years to fly to the nearest Proxima Centauri. More than a thousand years.

There is no way, the universe is too big, too big, not to mention going to the adjacent Hengxin system, even going to the adjacent planetary system will take several months.

Therefore, even if the speed required to leave the Milky Way is obtained with the help of the speed of the sun's revolution, how many millions of years will it take to leave the Milky Way with its diameter of more than 100,000 light-years?

(End of this chapter)