The team at LIGO (the Laser Interferometry Gravitational-wave Observatory) annouced they directly measured the gravitational waves emitted by two black holes merging into one. What are they talking about? Here’s the answer to 4 of the most common questions (plus 2 extra-credit, if you feel up to it). What are gravitational waves? Gravitational waves are ripples in space-time predicted by Einstein’s General Relativity theory. If … Continue reading Four fundamental things about gravitational waves