  Quadrupole oscillation modes in stars can resonate with incident
gravitational waves (GWs), and grow non-linear at the expense of GW energy.
Stars near massive black hole binaries (MBHB) can act as GW-charged batteries,
cooling radiatively. Mass-loss from these stars can prompt MBHB accretion at
near-Eddington rates. GW opacity is independent of amplitude, so distant
resonating stars can eclipse GW sources. Absorption by the Sun of GWs from
Galactic white dwarf binaries may be detectable with second-generation
space-based GW detectors as a shadow within a complex diffraction pattern.
