China Building Early Warning System for Earth-Smiting Asteroids

China is actively developing a comprehensive early warning system aimed at identifying asteroids that pose a threat to Earth. The initiative, led by Li Mingtao, chief scientist at the asteroid monitoring and early-warning research center under the China National Space Administration, will deploy a network of ground telescopes and a dedicated satellite constellation.

According to Li, the project is crucial because while over 95% of near-Earth asteroids larger than 1 kilometer in diameter have been identified, a substantial gap remains in detecting smaller objects. These smaller asteroids, around 140 meters across, could still devastate a small country, and only about 45% of them are believed to have been discovered.

"These undiscovered near-Earth asteroids pose the greatest risk," Li stated in a report published on June 30, coinciding with International Asteroid Day. He highlighted the challenges in detecting these objects, noting that they are numerous, faint until they approach closely, and can even appear suddenly from the direction of the sun.

The United Nations designated June 30 as International Asteroid Day to raise awareness about the threat of asteroid impacts and the importance of planetary defense. China's efforts contribute to the global endeavor of monitoring and mitigating potential asteroid threats.

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These undiscovered near-Earth asteroids pose the greatest risk. They are numerous, very faint before their approach and may even suddenly approach from the direction of the sun.