We propose a model of our universe as a 3-sphere resting on the surfac
e of a black hole which exists in a spacetime consisting of four space
dimensions and one time dimension. The matter and energy within our u
niverse exist as stationary solutions to the field equations in the Ri
ndler coordinates just above the horizon of the black hole. Each solut
ion may be thought of as a standing wave consisting of a wave propagat
ing toward the horizon superposed with its time-reversed twin propagat
ing away from the horizon. As matter and energy from the greater five-
dimensional spacetime fall into the black hole, its radius increases a
nd our universe expands. This mechanism of expansion allows the model
to describe a universe which is older than its oldest stars and homoge
neous without inflation. It also predicts galaxy counts at high redshi
ft which agree with observation.