The space elevator is a distant dream imagined by human beings.

But for the stars, it's just one of a five-year plan.

On the way of human civilization towards the interstellar age, many technologies belong to the pre-existing technology of the envisioned interstellar voyage.

For example, controllable nuclear fusion technology, warp speed engine, shield technology, high-power energy weapons, and so on.

Because of the difference in the technical route and the initial investment, there may be some emphasis on the focus of the science and technology tree, but it is generally the same.

Therefore, after completing the reception of the Wandering Earth World, Shen Sen put forward the overall requirements for the first five-year plan of the Star Empire.

On the basis of the existing stars, we should improve the reform and modernization system and explore the development of pre-star navigation technology.

With Shen Sen's supreme instructions as the core, more than 100,000 people from thousands of departments in the four worlds conducted rounds of rigorous and scientific discussions and analyses, and finally formulated the main development goals of the first five-year plan of the Star Empire.

First, on the basis of the existing space fleet, the quantity, quality, armament, and establishment of the fleet will be upgraded and expanded.

Second: Initial repair of the Wasteland's planetary shield system "Aeolus and Rain".

Third: the construction of space elevators and the construction of a basic interstellar logistics system.

In a way, these three plans are a triumph of layers, and they are all designed to create a galactic defense ring against external invaders.

At present, Qunxing takes building a large-tonnage and long-endurance combat platform as the ultimate goal, and divides the technology to be developed into key technologies and auxiliary technologies.

After distinguishing the priorities, the limited resources are concentrated on the technical bottleneck, and the technology peak is climbed step by step.

Assistive technologies include circular ecosystems, deep-sea states, cryonics, high-energy engines, electromagnetic emitters, and more.

Assistive technologies are as indispensable as key technologies, but they have long been out of the spotlight on the technology stage and have been less visible.

Taking the spaceship recycling ecosystem as an example, without self-sufficient recycling capabilities, it is impossible for human beings to step out of their own one-third of an acre, expand their borders, and become a real space civilization.

Among them, the key technologies are nuclear fusion engines and space elevators.

Wandering to the Earth World, where scientists determine the current index parameters of their space fleet based on the current developments in various disciplines, and speculate on the various technological levels that humanity may reach in the future.

Based on this, the Earth Space Force has planned six technical levels for 10,000-ton space warships, including three evaluation indicators: maximum speed, combat radius, and ecological cycle capability.

In the initial stage, 1,600 kilometers per second per second, the combat radius required to reach the orbit of Neptune, and the ecological circulation ability was basically almost none.

The low-tech level, 8,800 kilometers per second per second, requires the combat radius to be outside the Kuiper belt, and the ecological cycle capability to achieve partial circulation.

"The Point Guard Is Here"

At the medium technical level, it reaches 16,000 kilometers per second, about 5 percent of the speed of light, and the combat radius reaches the vicinity of the Oort Nebula, and the ecology achieves a complete cycle in the short term.

At a high-tech level, reaching 64,000 kilometers per second and about 20 percent of the speed of light, the combat radius crosses the Oort Nebula and affects other star systems, allowing for a long-term complete cycle.

The advanced technological level is basically close to the speed of light, that is, 290,000 kilometers per second, and the combat radius controls multiple star systems to achieve a planetary-level ecological cycle.

At the highest technological level, beyond the speed of light, the combat radius affects the entire galaxy, achieving a perfect ecological cycle.

This is an imaginary grand goal, and the Wandering Earth World has only reached the transition stage from low-level to medium-level technology.

At all costs, they could produce a spaceship that could reach the speed of five percent of light, but the metrics were still insufficient.

In order to ensure that the space warship has sufficient thrust and endurance power, the warship can only be equipped with the highest density energy nuclear fusion energy and antimatter that humans can master.

In the early days of the Five-Year Plan, chemical-fueled rockets, space shuttles, space planes, and other spacecraft appeared one after another.

They were eliminated either because they were cost-effective, or because they could not meet the needs of future interstellar missions.

The final winner belongs to the already very advanced non-working mass fusion engine, which can be produced on a large scale.

There are also some experimental models of small ships with antimatter engines.

One of the advantages of antimatter engines is that the annihilation of antimatter can occur spontaneously and does not require many conditions like nuclear reactions in nuclear engines, so there is no need for large reactors, which can reduce the weight of the ship.

However, due to the current limitations of antimatter production capacity and storage technology, it is impossible to mass-produce large spaceships, so we can only find a way to build a few small research ships to verify the technical model.

The production of spacecraft has been solved, but its subsequent use will need to be supported by infrastructure such as space-to-earth shuttle systems and space ports.

The result was a space elevator and a large, permanent space station.

The space elevator originated from an ancient dream of connecting the ground and the sky with a ladder through which people could travel between heaven and earth.

Tens of thousands of engineers in the Star Empire have demonstrated that the space elevator can be built based on the existing technology.

The essence of a space elevator is to build a permanent "cable" structure that connects the ground to a point in Earth's orbit and allows transports to travel along this cable.

It sounds like it's a lot like the elevator that is common in human society, the question is which two points to connect and how.

The Echelon 3 is the only space elevator with its base point at sea, and its base point is an artificial floating island on the equator in the Pacific Ocean, which can travel at sea with its own nuclear power, so it can be reported that the space elevator needs to be relocated along the equator.

A geostationary satellite is like a necklace, stationary relative to the ground directly below it.

These satellites are located 36,000 kilometres above the equator.

To ensure that the space elevator does not drift relative to the ground, one end can only be built on the equator, and the other end can be connected to a geostationary orbit satellite.

To realize the dream of a space elevator is much more difficult than myths and mediums.

The biggest challenge in building a space elevator is finding the materials to make the elevator cables.

The rope should be a long rope with high strength. If an ordinary steel wire hangs down from a height of nine kilometers, it will be pulled off by its own weight.

Fortunately, the researchers of the Star Empire have invented multi-walled carbon nanotubes, which has given people hope.

Carbon nanotubes are very small, but they are as strong as diamond and are so flexible that they can be made into fibers. Theoretically, a nanotube cable strip as wide as one meter wide and as thin as paper could support a weight of thirteen tons.

It's very simple to say, but from the time the plan was proposed to the final realization, the Star Empire mobilized millions of people, invested tens of trillions of credits, and spent a full five years to complete the construction of those three miracle stairs leading to space.

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