Bright Sword starts with the grenade flat.

Chapter 472 Advantages of Space Port

You should know that there were actually two main reasons why Wandering Blue Planet built a space elevator in the past. The first one was to build a navigator space station.

You should know that the original Navigator Space Station was actually mankind's Spark Project, and Liu Xiu naturally agreed to this plan.

Therefore, in order to build a navigator space station capable of interstellar voyages, its size naturally could not be small. After all, the spacecraft construction technology at that time could not be said to be very good.

I can only say that it is very bad. Before the spacecraft is equipped with a nuclear fusion reactor, the spacecraft that relies on chemical combustion as energy is a very bad spacecraft.

However, although the navigator space station, or the spacecraft, still used chemical fuels, the technology at the time was there after all, so even though it was very poor, it had to be built.

After all, technological breakthroughs cannot be achieved just by wanting to, so the Navigator space station that uses chemical fuel as its engine needs to be built.

In order to minimize construction costs and resources, something like a sky elevator naturally came into being. Of course, the birth of the space elevator not only facilitates the construction of the navigator space station.

It can also reduce the energy required to transport resources to the moon. After all, the stage where the rocket consumes energy is the journey from the surface of the planet to the orbit.

Of course, the same is true for the spacecraft in the Space Alliance, although they already have anti-gravity systems, powerful power and propulsion systems.

However, it still takes a lot of energy to escape the gravity of the planet, not to mention that some cargo ships are not equipped with any anti-gravity systems.

These cargo ships are like trailer trains in space. A powered bow can pull a long series of cargo boxes, so it is naturally impossible for them to land on the surface of the planet to unload.

Therefore, the space port used for transferring cargo is the best choice. There is no restriction of gravity, and it can be easily docked as long as the docking speed is maintained.

Then these goods will be unloaded through the port's unloading equipment and finally transported to the surface of the planet via the space elevator.

If it is a resource, it will be processed again, and if it is a commodity, it can be sold directly.
There is no other way. After all, the only place suitable for human survival is naturally the surface environment. Of course, the space port is responsible for the loading and unloading and transportation of goods.

Therefore, it is natural for them to live in the space port for a long time. There is no way that they can take the space elevator to travel 60,000 to 70,000 kilometers back and forth after finishing their work.

The reason why it takes a 60,000 to 70,000-kilometer trip back and forth is mainly because most of the planets suitable for human habitation are about the same size as the Blue Planet.

Therefore, its synchronous orbit is naturally at an altitude of more than 30,000 kilometers. If a space elevator or space port is to be built, it must be built on the equator of the planet, and its terminal position must also be in the synchronous orbit.

Therefore, the space port on a general planet is naturally more than 30,000 kilometers above the ground.

Therefore, even if the space elevator is very fast, it is still unbearable to travel more than 60,000 to 70,000 kilometers back and forth every day. This will greatly occupy the rest time of human beings, so it is necessary to build a residence in the space port.

Of course, it is not difficult for the Space Alliance to establish a rest area with its technology. In order to make living comfortable, an artificial gravity field was also created so that people in the space port can feel the same gravity as on the surface of the planet.

After all, losing gravity and living in a weightless environment for a long time is a very dangerous thing, so gravity is an indispensable thing for humans. This is like when Wandering Blue Planet was not yet completed with artificial gravity, it took great pains to build a large centrifuge to simulate gravity when building the navigator space station.

After all, living on the surface of a habitable planet, the gravity of the habitable planet constantly pulls our bodies down, keeping us firmly on the ground. Every time we move, the muscles of our body must constantly contract and stretch to resist the force of gravity. The gravity of the habitable planet makes us shorter when we are awake.

Gravity also pulls our blood down our legs, and our hearts have to work harder to pump oxygen-rich blood to our brains. Our bodies have adapted to the conditions of a habitable planet. The lack of gravity in space has profound effects on the human body, and these effects will grow stronger the longer humans live in space.

After all, humans have long been accustomed to the gravity effects of habitable planets. As they stay in a zero-gravity environment for a long time, the first thing that happens is muscle loss. Although the workers in the zero-gravity environment appear to be agile, in fact, in a microgravity environment, astronauts usually see their muscles atrophying.

Bones also lose mineral density, and blood volume decreases. In space, human muscles atrophy because they are not being used. And after just two weeks of exposure to microgravity, astronauts' muscles can become significantly reduced and weakened.

The muscles of the legs and torso are most affected because astronauts do not need to walk or stand under gravity, and the strength of the legs and waist will not be used as often as on a habitable planet.

The muscle changes caused by weightless flight are very similar to the changes in muscle decline in the human body as it ages. Although it can be delayed through exercise, serious problems will occur once you return to a habitable planet, and this damage happens frequently. Therefore, if you see an astronaut being able to walk out of the cockpit by himself after the space shuttle lands, it proves that the astronaut's physical fitness is very strong.

Space travel also has a significant impact on astronauts' skeletons. Since gravity does not pull the human body downward, astronauts' spines will stretch a few millimeters after wandering in space for a period of time away from habitable planets.

The increase in spinal length is due to an increase in the volume of fluid within the discs, much like a hydraulic lift system being filled with hydraulic fluid.

But when we are on a habitable planet, these fluids are usually squeezed out by the habitable planet's gravity throughout the day. This hydraulic effect, combined with the changes in muscle control that weaken the spine, can cause damage to the spine.

This can further lead to lower back pain during spaceflight and after landing. In fact, astronauts have a much higher risk of developing a herniated disc within a year of returning from space.

On habitable planets, every time we land after taking a step or jumping, our bones, especially those in our legs, are subjected to compressive loads due to gravity. This helps our bones maintain the proper mineral density.

This is why athletes tend to have stronger bones. Since astronauts' bones are not burdened in space, their bone density naturally decreases. The only exception is the bones in the upper body.

They are used more in space, so the bone density of the upper limbs increases slightly during life in space. This loss of bone density in the legs causes the bones to become brittle, just as in people with osteoporosis.

(End of this chapter)