comparable mass to what LIGO first saw. At the centers of some galaxies, supermassive binary black holes may exist, creating a signal far stronger than this illustration shows, but with a frequency that
Somewhere in space, two neutron stars slowly orbit one another. Their slow dance would have a cataclysmic ending. They were doomed to collide, to merge in a spectacular display of gravitational wave fireworks.
The question startled me. If anyone knew where the time goes, I would have expected it to be the man across the lunch table, Alan Lightman. Dr. Lightman is best known in literary circles for his 1992 “Einstein’s