US expert on underground nuclear tests held in China for 18 months

An American scientist who has studied underground nuclear tests has been detained in China more than 18 months on spying ...

U.S. Presses China to Free American Scientist Accused of Spying

President Trump has urged Xi Jinping to release the scientist, Youlin Chen, the man’s family says. Dr. Chen studied the detection of North Korean nuclear tests.

For time-critical events: NINJA prepares for first on-sky observations

This summer, Subaru Telescope will welcome a new near-infrared spectrograph, NINJA, for its first on-sky engineering ...