成立于2026年的太空起源企业正在推进商业航天产业的下一阶段竞争。[1]该公司率先布局二级火箭复用技术，采用气动减速方案，这一方案更加适应中国商业航天的现状。[1]太空起源团队主要来自航天系统和清华大学航天航空学院，平均从业时间超过15年。[1]公司计划通过缩比验证机飞行试验来验证核心技术，最终目标是打造可重复使用的空天飞行器基础设施。[1]
二级火箭复用面临的技术难度远高于一级火箭。[1]二级火箭返回速度高达25马赫，约为一级的4倍，动能差距接近16倍，峰值热载荷相差可达64倍。[1]返回时箭体头部温度超过1600摄氏度，面临极端热流冲击。[1]相比之下，SpaceX猎鹰9号已突破一级火箭36次可复用，发射费用约为3000美元/kg；星舰实现一二级全复用后发射费用约600美元/kg。[1]
2025年中国完成商业航天发射50次，入轨商业卫星311颗，相比美国SpaceX一家企业完成165次发射、入轨卫星约3800颗，产业差距依然明显。[1]
The commercial aerospace industry is shifting its focus from first-stage booster recovery toward second-stage rocket reusability, marking the next competitive battleground. Space Origin, a company founded in 2026, is taking the lead in second-stage recovery technology by adopting an aerodynamic braking approach better suited to China's commercial spaceflight landscape [1]. The company, staffed primarily by aerospace industry veterans and graduates from Tsinghua University's School of Aerospace Engineering with an average of over 15 years of experience [1], plans to validate core technologies through scaled-prototype flight tests with the ultimate goal of building reusable space-air vehicle infrastructure [1].
The technical challenges of second-stage reusability are substantially more severe than first-stage recovery [1]. Upon reentry, second-stage rockets reach speeds of approximately 25 Mach—roughly four times faster than first-stage vehicles—creating dynamic pressures nearly 16 times greater and peak thermal loads potentially 64 times higher [1]. The rocket's nose section experiences temperatures exceeding 1,600 degrees Celsius during reentry, exposing the vehicle to extreme thermal shock [1]. These difficulties contrast with SpaceX's Falcon 9, which has achieved 36 first-stage rocket reuses with launch costs of approximately $3,000 per kilogram; when Starship achieves full two-stage reusability, launch costs are projected to drop to roughly $600 per kilogram [1].
China's commercial aerospace sector launched 50 missions in 2025, placing 311 commercial satellites into orbit [1], significantly behind SpaceX's 165 launches and approximately 3,800 deployed satellites over the same period [1]. Space Origin's advancement in second-stage reusability technology positions the company as a potential contributor to narrowing this competitive gap.
