China has successfully developed a solar-powered high-altitude drone capable of flying nonstop for up to six months at an altitude of around 20 kilometers (65,000 feet) — a zone often referred to as the “near-space” layer of Earth’s atmosphere. This milestone highlights major progress in long-endurance unmanned aerial systems. Operating above commercial air traffic and weather systems, the drone uses high-efficiency solar panels and advanced energy storage to remain airborne day and night withou
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