  We show that the Kepler spacecraft in two-reaction wheel mode of operation is
very well suited for the study of eclipsing binary star systems. Continued
observations of the Kepler field will provide the most enduring and long-term
valuable science. It will enable the discovery and characterization of
eclipsing binaries with periods greater than 1 year - these are the most
important, yet least understood binaries for habitable-zone planet background
considerations. The continued mission will also enable the investigation of
hierarchical multiple systems (discovered through eclipse timing variations),
and provide drastically improved orbital parameters for circumbinary planetary
systems.
