  Many large-scale phenomena in our Universe, such as gravitational waves, are
challenging to reproduce in laboratory settings. However, parallels with
condensed matter systems can provide alternative routes for experimental
accessibility. Here we show how spin nematic phases provide a low-energy avenue
for accessing the physics of linearized gravity, and in particular that their
Goldstone modes are relativistically-dispersing massless spin-2 excitations,
analogous to gravitational waves. We show at the level of the action that the
low-energy effective field theory describing a spin nematic is in
correspondence with that of linearized gravity. We then explicitly identify a
microscopic model of a spin-1 magnet whose excitations in the low energy limit
are relativistically dispersing, massless spin-2 Bosons which are in one-to-one
correspondence with gravitational waves and, supported by simulation, outline a
procedure for directly observing these analogue waves in a cold gas of
$^{23}$Na atoms.
