Chinese scientists have engineered a groundbreaking magnetic facility that recreates low-gravity lunar environments, enabling rigorous testing of instruments before their deployment to the Moon.
Situated in Xuzhou, this state-of-the-art low-gravity simulator is set to become fully operational in the coming months. Housed in a 60-centimeter-diameter chamber, it employs powerful magnetic fields to levitate rocks and dust, mimicking extended lunar conditions. Lunar gravity, for context, is just one-sixth of Earth's.
Li Ruilin, a geotechnical engineer at China University of Mining and Technology, describes the chamber as the "first of its kind worldwide" capable of delivering low-gravity conditions "for as long as needed." This innovation elevates lunar simulations dramatically. While short-duration tests like impacts last seconds, prolonged experiments—such as creep tests on metals under extreme heat and pressure—can span days.
The technology draws inspiration from Andre Geim, a University of Manchester physicist who earned the satirical Ig Nobel Prize in 2000 for levitating a frog using magnets. He later shared the 2010 Nobel Prize in Physics with Konstantin Novoselov.
Geim harnessed diamagnetic levitation. Atoms consist of nuclei orbited by electrons, generating minute magnetic fields that typically cancel out in random orientations, rendering most materials non-magnetic.
Introducing a strong external magnetic field realigns electron orbits, prompting them to generate opposing fields. When sufficiently intense, this repulsion overcomes gravity, achieving stable levitation.
These tests will advance China's lunar exploration program. In March 2021, Zhang Kejian, director of the China National Space Administration, signed a pact with Russia to build a lunar scientific station, paving the way for sustained human presence.
