  We elucidate the nature of neutral collective excitations of fractional
quantum Hall liquids in the long-wavelength limit. We demonstrate that they are
chiral gravitons carrying angular momentum - 2, which are quanta of quantum
motion of an internal metric, and show up as resonance peaks in the systems
response to what is the fractional Hall analog of gravitational waves. Relation
with existing and possible future experimental work that can detect these
fractional quantum Hall gravitons and reveal their chirality are discussed.
