#170Gravitational Waves
An inspiraling compact binary radiating ripples of spacetime, drawn as a warped reference grid and starfield. Two neutron stars spiral inward on a post-Newtonian chirp — as the time-to-coalescence x shrinks, the orbital frequency sweeps up like x^(−3/8), the separation contracts as x^(1/4) and the strain amplitude climbs — then they merge in a flash and the remnant rings down as a damped sinusoid. The wave itself is the quadrupole strain h(r,t): a plus/cross polarization pattern with the tell-tale cos(2φ) angular lobes, radiating outward at the wave speed with a 1/r falloff, retarded by the distance r. It displaces every background coordinate (stretch one axis, squeeze the orthogonal one), so the grid breathes in concentric rings sweeping out from the pair. It auto-loops inspiral → merger → ringdown; hover to widen the binary separation, and press to trigger the merger.