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宇宙移住のための３つのコアコンセプト
Three essential “Core” concept for space migration
山敷庸亮 1
Yosuke YAMASHIKI 1
京都大学大学院総合生存学館 SIC 有人宇宙学研究センター，SIC Human Spaceology Center, Graduate School of
Advanced Integrated Studies in Human Survivability#1,
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Three “Core” Concept
When considering the planetary migration of the human race to other terrestrial planets within our Solar

System, it is crucially important to survey what kind of resources can be established for a self-sufficient system.
This system cannot depend upon planet Earth to secure food, clothing, or construction materials, to sustain a“space society” on each planet. We call the life-support system and the actual global ecosystem a "core biomecomplex", and the technical system necessary for maintaining the "life" system "core technology". We named
this circular society on each planet the "core society", with the minimum necessary important systems that do
not depend on other ecosystems. We use these to scrutinize and examine the realization of a "space society".
In particular, in order to sustainably maintain the "core biome complex" existing on the earth for a long periodof time, it is important to establish a system that is not overly dependent on other systems 1).

The "core biome complex" is defined as the basics that are indispensable to the terrestrial (global) ecosystem,
and is the simplest form of the global ecosystem by extracting the functions of the dominant biome in eachlocation on the Earth. We define each of the core biome states as "Standard Biome", "Extreme Biome", and"Habitable Biome". The "Standard Biome" refers to a state in which each core biome is generally functioning
normally and biodiversity is maintained. Extreme Biome is a biome in which biodiversity is reduced by certain
1 of 2phytoplankton. To realize human habitation in space, we need a technological system for survival that takes
into account the uniqueness of space. Let us name these "core technologies”. The two most important
technologies for habitation on planets other than Earth are (1) space radiation protection technology and (2)artificial gravity technology. These two item can be selected when the technology of “Life supporting system”
has already been established. As the third “core” item of “Core Society”, The two major disciplines that will
support society in the relocated environment are (1) space law and sociology and (2) space medicine.
The core biome concept is based on the central axis that humans need to bring their own ecosystems inorder to settle in space for a long period of time, and it is very important to be able to explain the cost for
maintaining ecosystem. There is also the question of how we can think about and control species that are"undesirable" to humans. Once insects such as mosquitoes and cockroaches, which are generally considered"pests," are introduced into the space ecosystem, we will face the "difficult" question of how to deal with them.
At the same time, we must also consider pathogenic microorganisms and viruses.
The "ecosystem" we have described here is only a terrestrial ecosystem and is an "alien species" to otherplanets. If there is an ecosystem at the destination, bringing the Earth's ecosystem along with humans would
be an invasion of alien species for that planet. In other words, in terms of Planetary Quarantine, the core biome
concept can be a concept that "justifies" the invasion of alien species (terrestrial ecosystem) into different planet.
Considering such a case, it may be difficult to reproduce the Earth's environment on the target planet, but
it will be recognized as "correct" to reproduce the ecosystem on the planet in a completely closed dome-likestructure that reproduces the Earth's environment and is completely cut off from the planet's externalenvironment. The "core technology" challenge is to create a dome-like structure that reproduces the Earth'senvironment in a completely closed environment. We determine this as “Terrawindows” which can becompared with the “Terraforming”.

Figure 3 Terraforming vs terrawindows
References1)

Yamashiki Yosuke et al.: Human Spaceology, three “core” concept for the space migration, 1st Ed. Kyoto University
Press (2023)

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