1.1. Population

The population growth of a planet forms the foundation of its development. Each planet strives to increase the number of settlers through immigration policies. Increasing the population is important because it leads to an increase in credits obtained through taxes. While maintaining a certain tax rate is necessary to secure credits, imposing higher taxes can hinder population growth.

To increase the population, continuous development of residential facilities tailored to various climates on the planet is necessary. Investing in residential facilities is an investment in the planet's future.

1.2. Credit

There was a long period of struggle to establish a unified currency unit for the entire galaxy's new human civilization. Each planet aimed to create its own market, using its own planetary unit as the reserve currency, as it would play a significant role in dominating the galactic economy.

However, this issue sometimes led to wars over planetary dominance, although leaders of all planets recognized the inefficiency of such conflicts. Through prolonged disputes and dialogues, the planets decided to adopt a new currency unit called "credit," which would not be tied to any specific planetary currency.

The credits of a planet are obtained through taxes based on population growth or through the development of trading centers.

1.3. Crystal

The rapid advancement of human space exploration was achieved through significant developments in robotics and electronic space engineering. This remarkable progress in the field of mechatronics, the integration of electronics and machinery, was made accessible to ship technicians on each planet through holographic manuals. The engineering advancements were a result of the discovery of a new energy source known as crystals.

Prior to the discovery of crystals, nuclear energy served as the primary energy source for humanity. Developed nuclear energy was used as fuel for spacecraft engines. However, nuclear energy posed challenges such as excessive weight, inefficiency, and safety concerns. Presently, advanced nuclear energy is utilized for purposes like destroying enemy ships, but due to the inherent risks of nuclear fusion, it is limited to specific domains.

Therefore, the discovery of crystals marked the first major innovation as a new energy source. The majority of spacecraft in the current human civilization utilizes crystal conglomerates as their main fuel source. Crystals are known to be evenly distributed across various planets in the galaxy.

1.3.1. Types of Crystals

Most crystals used by humans are transparent. They have a slightly bluish hue from certain angles but generally resemble bright gemstones. Although there are yellow, green, and red crystals, their utility is currently limited due to their scarcity.

1.3.2. Processing Crystals

During the era when nuclear energy was dominant, spacecraft faced challenges related to the high weight and control facilities of nuclear fuel, as well as safety concerns. In contrast, crystals allowed for easy spacecraft control with significantly lower density and weight.

The processing methods for crystals have continued to evolve. Initially, the approach involved utilizing the tremendous stored energy within crystals directly for spacecraft propulsion. However, this proved to be inefficient, as a considerable amount of energy leaked externally. A breakthrough occurred when a new method was discovered to contain the energy within crystals using a substance called PI2, found on the X2 planet, where the stranded human civilization was located. By enclosing crystals with devices made of PI2 compounds, it was found that the energy of the crystals could be retained without leakage.

As a result, the energy of crystals, which used to gradually dissipate when stored on planets, could now be permanently preserved and utilized. When using crystals in spacecraft, a specific amount is continuously allowed to escape through the front surface of the crystal, surrounded by the PI2 substance, enabling nearly lossless energy utilization.

1.3.3. Crystal Grinding

In the early stages, crystals were primarily used as spacecraft energy sources. However, with the development of crystal grinding technology, crystals found applications in various fields. Grinding transparent crystals and incorporating them into the construction of space bases revealed that the existing material, ultra-high-strength titanium, could be made even stronger.

The advancement of grinding technology has enabled extensive utilization of crystals not just as spacecraft fuel but also in the development of various structures for human civilization.

1.3.4. Special Crystals

As mentioned earlier, yellow, green, and red crystals exist in very limited quantities but are known to possess greater energy potential. Although research on these special crystals is still limited due to the scarcity of samples, there are expectations that they could be utilized for new purposes

1.4. Gas

하이드레이트(Hydrate)는 낮은 온도와 높은 압력에서 가스와 물이 결합되어 형성된 고체 에너지원이다. 해저의 고압 저온 상태에서 분자 간의 결합으로 형성되는 3차원 격자 구조로 형성되어 있으며, 격자 구조 내의 빈 공간에 작은 가스 분자가 화학 결합이 아닌 물리적으로 결합하여 약고체 상태로 존재한다. 상온에서는 다시 기체화 된다.

가스는 보통 물이 있는 행성의 지하에 많이 존재한다. 기체가 많은 행성의 경우 대기중에서 채취할수도 있지만 그 양은 적다. 일반적으로 채취하는 방식은 행성지하에 채취관을 뚫어 저장하는 방식이다. 이후 다른 기체를 제거하고 정제하여 가공한다.

1.4.1. Gas의 활용

은하계의 새로운 자원으로 부상한 크리스탈 에너지와 더불어 가장 중요한 자원은 바로 가스이다. 가스 하이드레이트라 불리는 이 자원은 건설과 여러 부품 함선 제조시 다양하게 사용되고 있다. 또한 크리스탈을 가공하기 위해 쓰이기도 하는데 특히 함선의 오랜항해도중 함선의 여러 장치들을 움직이는 내부 연료로서 활용된다. 때문에 다수의 함선을 운용하는 각 행성지도자들은 가스를 많이 비축하려 하고 있다.

1.4.2. Gas의 소모

가스는 해병의 가우스건의 에너지원으로 쓰이고 생명유지장치의 동력자원이 된다. 때문에 각 함선들은 크리스탈 에너지 이외에도 가스 에너지가 꼭 필요하다. 특히 강습해병을 다수 이용하는 우주모함들은 가스의 소모량이 더 크다. 과학자들은 기술적인 발전으로 가스의 소모량을 줄이는 방법을 연구중에 있다.