게시일: 2026 년 4 월 23 일 (수요일)
Following a December 2025 executive order prioritizing “American space superiority,” NASA is advancing nuclear propulsion under the leadership of Administrator Jared Isaacman.
The centerpiece of this new era is Space Reactor-1 (SR-1) Freedom. Slated for a December 2028 launch, it will be the first interplanetary spacecraft powered by a nuclear fission reactor.
It aims to finally realize the long-held goal of nuclear-powered space travel by launching a nuclear electric propulsion rocket to Mars.
If successful, it would clear the path to the establishment of a permanent, nuclear-driven base at the Moon’s south pole.
Advancing nuclear goal
Nuclear thermal propulsion has remained in a cycle of development, never reaching operational deployment.
SR-1 Freedom aims to break that cycle by utilizing existing technology to meet a strict 2028 deadline.
Despite 60 years of research and $20 billion spent on various failed or aborted programs, this mission seeks to succeed where its predecessors — such as the short-lived SNAP-10A — failed.
To ensure it hits the 2028 launch window, NASA is intentionally limiting the spacecraft’s scope, pairing a single new nuclear reactor system with proven, existing technologies rather than attempting a total design overhaul.
Isaacman characterizes the SR-1 Freedom as a “70 percent solution,” designed primarily to demonstrate the viability of nuclear propulsion rather than serve as a final, perfect model.
The spacecraft will use a 20-kWe reactor fueled by HALEU (High-Assay Low-Enriched Uranium) to power advanced electric thrusters.
It is expected to be activated within 48 hours of launch, beginning its year-long journey to Mars.
Skyfall mission
Its primary mission? To act as a mother ship for Skyfall, a triad of “Ingenuity-style” helicopters.
Equipped with ground-penetrating radar, the drone swarm will survey potential landing sites and identify ice deposits, providing the critical data needed to verify the terrain for upcoming crewed missions.
NASA aims to move from hardware development in June 2026 to a December 2028 launch for SR-1 Freedom.
📌 한국어 요약
NASA 가 2028 년 12 월 화성으로 보낼 최초의 원자력 추진 우주선 ‘SR-1 Freedom’을 발표했습니다. 이 우주선은 핵분열 반응기로 작동하며, 화성 착륙용 드론 ‘Skyfall’을 운반합니다. 성공 시 달 남극에 영구 기지 건설의 길이 열립니다. 60 년간의 연구 끝에 실용화에 도전하는 이번 임무는 기존 기술을 활용하여 2028 년 발사 목표를 달성하려 합니다.
📚 핵심 단어
- Nuclear fission reactor: 핵분열 반응기 – 원자력을 이용해 에너지를 생산하는 장치
- Interplanetary: 행성 간 – 태양계 내 여러 행성 사이를 오가는
- Propulsion: 추진 – 물체를 앞으로 밀어 움직이게 하는 힘
- Helium: 헬륨 – 무거운 기체로 우주선 냉각에 사용
- Drone swarm: 드론 군집 – 여러 대의 드론이 협력하여 작동하는 시스템