Whispers from the Cosmos

Ripples in spacetime have recently been detected by a LIGO/Virgo detectors. These spacetime whispers have provided unprecedented information about the final dance of binary neutron stars and blackholes. Along with these spectacular recent discoveries, I will discuss other “likely” (more accurately, things I have worked on) sources of such whispers including: (i) the spacetime dynamics close to the big bang, (ii) exotic compact objects made of dark matter in the contemporary universe.