Circular orbits in Kerr spacetime: equatorial plane embedding diagrams

An embedding diagram helps visualize the observer-dependent projected spati al geometry of the equatorial plane in the Kerr spacetime as Seen by a fami ly of circularly rotating observers. This is described for the various geom etrically defined families of such observers, motivated by the attempt to b etter understand how the spatial geometry contributes to the properties of particle motion as seen by those observers. A new family of observers is in troduced for which the equatorial plane appears to be flat.