重力波検出器LIGOが再び
After a three-year hiatus made longer by pandemic troubles, the search for gravitational waves — ripples in space-time that are the hallmarks of colliding black holes and other cosmic cataclysms — has resumed.The Laser Interferometer Gravitational-Wave Observatory (LIGO), which has two massive detectors in Hanford, Washington, and Livingston, Louisiana, is now restarting with improved sensitivity…