Summary：**Miami startup launches first-ever tritium-powered CubeSat on SpaceX Falcon 9** Early Tuesday morn

referrerpolicy="no-referrer"
style="max-width:100%;height:auto;display:block;margin:0 auto;">

**Miami startup launches first-ever tritium-powered CubeSat on SpaceX Falcon 9**

Early Tuesday morning, a soft‑ball‑sized satellite built by Miami‑based City Labs slipped into low Earth orbit aboard a SpaceX Falcon 9, marking the debut of the first commercially fabricated spacecraft to carry a nuclear power source. The mission, cleared by federal regulators after a rigorous safety review, also represents the inaugural commercial nuclear‑powered flight licensed for private operators. City Labs’ Tritium‑CubeSat, measuring just 10 cm on each side, relies on a betavoltaic cell that converts the low‑energy electrons from tritium decay into steady electricity, eliminating the need for bulky solar arrays or chemical batteries on short‑duration missions.

**Key Developments**
The launch occurred at 07:14 EST from Cape Canaveral’s Launch Complex 40, with the Falcon 9’s first stage returning to a drone ship for reuse—a testament to SpaceX’s rapid turnaround capability. City Labs engineers reported that the betavoltaic payload began delivering power within minutes of separation, maintaining a stable 0.5 watt output throughout the initial orbit insertion phase. Telemetry confirmed that the CubeSat’s attitude control, communications, and onboard experiments operated nominally, validating the concept that radioactive isotopes can serve as a reliable, long‑life power source for micro‑satellites. The flight also carried a secondary payload of Earth‑observation sensors, demonstrating that the nuclear system does not interfere with typical scientific instruments.

**Industry Analysis**
Historically, nuclear power in space has been reserved for large, government‑funded probes such as