Gravitational wave detector LIGO is back online after 3 years of upgrades – how the world's most sensitive yardstick reveals secrets of the universe
- Written by Chad Hanna, Professor of Physics, Penn State
When two massive objects – like black holes or neutron stars – merge, they warp space and time. Mark Garlick/Science Photo Library via Getty ImagesAfter a three-year hiatus, scientists in the U.S. have just turned on detectors capable of measuring gravitational waves - tiny ripples in space itself that travel through the universe.
Unlik...