China Launches High-Precision Telescope on Roof of the World
- China initiated construction on Saturday, September 21, 2025, of the Xue-shan-mu-chang 15-meter SubMillimeter Telescope (XSMT), a significant advancement in the nation's astronomical observation capabilities.The telescope is located on...
- The XSMT represents China's first independently developed advanced submillimeter wave telescope.
- Once completed, the XSMT is projected too join the Event Horizon Telescope (EHT), a global network of radio telescopes that work together to create a virtual Earth-sized telescope.
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China Begins Construction of Advanced Submillimeter telescope in Antarctica
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China initiated construction on Saturday, September 21, 2025, of the Xue-shan-mu-chang 15-meter SubMillimeter Telescope (XSMT), a significant advancement in the nation’s astronomical observation capabilities.The telescope is located on the Qinghai-Tibet Plateau, a region chosen for its high altitude and dry climate, ideal conditions for submillimeter astronomy. China Daily Hong Kong first reported the launch.
The XSMT represents China’s first independently developed advanced submillimeter wave telescope. Submillimeter astronomy studies the universe at wavelengths between infrared and radio waves, revealing information about the cold universe – the formation of stars, planets, and galaxies. This wavelength range is especially useful for observing dust and gas clouds that obscure visible light.
Key Features and Capabilities
Once completed, the XSMT is projected too join the Event Horizon Telescope (EHT), a global network of radio telescopes that work together to create a virtual Earth-sized telescope. The EHT famously produced the first image of a black hole in 2019, and the XSMT’s contribution will enhance the network’s ability to capture dynamic images of black holes and other celestial objects. The telescope will also substantially boost China’s international standing in astronomy and astrophysics.
scientists detailed the project’s background, construction progress, and future development plans in an article published on Friday, September 20, 2025, in SCIENCE CHINA Physics, Mechanics & Astronomy.This publication underscores the rigorous scientific planning and execution behind the project.
The Importance of Submillimeter Astronomy
Submillimeter astronomy is a rapidly growing field, offering unique insights into the universe. Unlike visible light, submillimeter waves can penetrate the dust and gas clouds that often obscure our view of star and planet formation. This allows astronomers to study these processes directly, revealing the conditions under which new stars and planetary systems are born.
The Qinghai-Tibet Plateau provides an ideal location for submill