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The world’s largest single-dish radio observatory is preparing to open to astronomers around the world, ushering in an era of exquisitely sensitive observations that could help to hunt for gravitational waves and probe the mysterious fleeting blasts of radiation known as fast radio bursts (FRBs). The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southern China has just passed a series of technical and performance assessments, and the Chinese government is expected to give the observatory the final green light to begin full operations at a review meeting scheduled for this month. “We do not see any roadblocks for the remaining transition,” says Di Li, the chief scientist of FAST. “I feel both excited and relieved.