China is preparing to launch a kilometer-wide solar power plant into space, set to orbit 36,000 kilometers above Earth in geostationary orbit. This ambitious project will remain fixed above a single point on the planet’s surface, providing a consistent stream of solar energy unaffected by weather, daylight, or seasonal variations. Once operational, the facility is expected to generate as much energy in one year as the total remaining oil reserves on Earth, with the energy transmitted back to the surface via microwaves.
According to reports from the South China Morning Post, the project’s lead aerospace engineer, Long Lehao, described the space-based plant as “another Three Gorges Dam project above the Earth.” The comparison refers to China’s iconic 2,335-meter-long hydropower dam on the Yangtze River—the world’s largest producer of hydropower. Long emphasized that the new solar power station holds similar national importance, calling it an incredible technological milestone capable of reshaping the world’s approach to renewable energy. The facility, he added, would serve as a monumental example of China’s expanding capabilities in aerospace innovation and clean energy.
Space-based solar panels are designed to capture sunlight without the interruptions that terrestrial systems face. On Earth, clouds, weather patterns, and the day-night cycle limit solar output. However, panels in orbit can continuously harness sunlight and convert it into electricity, achieving uninterrupted energy generation. Engineers estimate that these space-based photovoltaic systems can be up to ten times more efficient than their Earth-based counterparts, as they avoid atmospheric interference and can capture solar radiation at its strongest intensity. Once captured, the power would be transmitted back to Earth safely through microwave beams aimed at dedicated ground stations.
Construction of the Chongqing Space Solar Power Plant began in 2019, marking a key step toward achieving sustainable space-based energy. The launch will rely on the Long March-9, China’s upcoming reusable heavy-lift rocket designed for deep-space missions and large payloads. The spacecraft will carry the plant’s modular components into orbit, where they will assemble into a one-kilometer-wide structure capable of continuously collecting solar energy. If successful, this initiative could position China at the forefront of extraterrestrial energy development, potentially transforming how nations think about power generation beyond the planet’s surface.
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