02 · Properties of the Cosmos宇宙的属性

Space Colonization太空移民

Level · Space层级 · 空间

"A species is either single-planet — and mortal — or multi-planet, and not.""一个物种要么只有一颗行星，因而必死；要么跨越多颗，因而不死。"

Plane位面

Exploration探索

Value价值观

Planetary Stewardship星球运营

Cosmic name其名

Eternal Stars繁星永恒

The frontier前沿概述

Space colonization is the project of turning the solar system from scenery into territory. It begins with the bare physics — escape velocity, delta-v, life support — and ends with civilizational design: who gets to leave, what laws apply at L5, what counts as a home when the sky outside is black. Reusable rockets cut launch cost a hundredfold in a decade; Starship aims to cut it another order of magnitude. Behind the engineering sits the deeper claim: that being grounded on one world makes humanity a single point of failure.太空移民，是把太阳系从背景变为领土的事业。它始于赤裸的物理——逃逸速度、Δv、生命维持——终于文明设计：谁有权离开？拉格朗日五点适用哪部法律？当窗外的天空是黑色，怎样才算“家”？十年间，可复用火箭把发射成本砍下两个数量级；星舰再图砍掉一个。工程背后的更深主张是：被一颗星球钉住的人类，是单一故障点。

Historical evolution历史演化

1903
Tsiolkovsky's equation齐奥尔科夫斯基方程
The math of multistage rockets is written before any rocket exists.在火箭尚未存在之前，多级火箭的数学已被写下。
1957
Sputnik斯普特尼克
The first human-made object in orbit; the Space Age begins.首颗人造卫星入轨，太空时代开启。
1969
Apollo 11阿波罗 11 号
Two men walk on the Moon and come back alive.两人在月球上行走，并活着归来。
2008
Falcon 1 reaches orbit猎鹰 1 号入轨
The first privately developed liquid-fuel rocket to orbit Earth.首枚私人研发并入轨的液体燃料火箭。
2015
Falcon 9 lands猎鹰 9 号回收
First orbital-class booster to land vertically and re-fly — the cost curve breaks.首个垂直回收并复用的轨道级助推器——成本曲线断裂。
2024–
Starship era星舰时代
Full-flow staged-combustion Raptors and 100+ tonne payloads make Mars logistics arithmetic, not science fiction.全流量分级燃烧的猛禽引擎与百吨级载荷，使火星物流由科幻变为算术。

State of the art今日状态

Launch is no longer the bottleneck — payload mass to LEO has dropped from ~$54,000/kg in the Shuttle era to under $1,500/kg, and Starship aims for $100/kg. The frontier has moved up the stack: in-space refueling, lunar surface logistics, closed-loop life support, Martian ISRU (in-situ resource utilization), and the political question of who governs cislunar space.发射不再是瓶颈：低地轨道载荷成本从航天飞机时代的约 5.4 万美元/公斤，跌至现在不足 1500 美元/公斤，星舰志在 100 美元/公斤。前沿已经上移：轨道加注、月面物流、闭环生命维持、火星就地资源利用，以及“谁来治理地月空间”这一政治问题。

Where it goes next未来走向

→
Permanent lunar industry — water ice mining, oxygen, propellant depots — by the 2030s.2030 年代，月球永久工业——水冰开采、制氧、推进剂仓库。
→
First Mars settlement of 100+ residents, optimizing for closed-loop and birth-on-Mars.首批 100 人以上的火星定居点，针对闭环与“火星出生”优化。
→
Free-flying orbital habitats (O'Neill cylinders) as the long-term endpoint.自由飞行的轨道栖居地（奥尼尔圆筒），作为长程终点。
→
An asteroid resource market displacing terrestrial mining for platinum-group metals.小行星资源市场，取代地球上对铂族金属的开采。

Applications today现今应用

Satellite internet (Starlink, Kuiper) and global comms.卫星互联网（Starlink、Kuiper）与全球通讯。
Earth observation — climate, agriculture, defense.对地观测——气候、农业、国防。
Microgravity manufacturing of fiber and pharmaceuticals.微重力下的光纤与药物制造。
Planetary defense via asteroid deflection.通过偏转小行星实施行星防御。