Gauge invariant observables in de Sitter

The construction of gauge-invariant observables is a longstanding problem in quantum gravity. Cosmologically relevant spacetimes are a particularly interesting context in which to study such observables. Using the technique of group averaging we construct gauge-invariant observables in the case where spacetime is perturbatively global de Sitter. In the appropriate limit these observables reduce to local observables of quantum field theory; additionally, they reproduce the local observable algebra. Bounds on the locality of these observables are briefly discussed.