Work starts on space project to find gravity waves

Ground infrastructure construction on China's gravitational wave research project, Tianqin, began on Sunday in Zhuhai, Guangdong province.

At an estimated cost of 10-20 billion yuan ($1.5-3 billion), the project plans four steps during the coming two decades to launch three satellites into high Earth orbit and detect gravitational waves.

The first step includes the construction of a 30,000-square-meter research building, a 10,000-sq-m ultraquiet cave laboratory and a 5,000-sq-m observation station on the Zhuhai campus of Guangzhou-based Sun Yat-Sen University.