be based at the Danish AsteroSeismology Centre (DASC, Aarhus) (Christensen-Dalsgaard et al. 2007). There is wide participation from the international community in the Kepler Asteroseismology Science Consortium (KASC).

The nominal mission lifetime is $\approx 4$ years. There will potentially be a few hundred Sun-like asteroseismic targets, with about 100 eventually getting continuous coverage over the entire mission. This last element is crucial, in that it is only from extended observations that certain scientifically rich, but extremely subtle, elements of the oscillation spectra can be measured, e.g., frequency asymmetries of mode peaks (diagnostics of granulation) and frequency asymmetries of mode splittings (diagnostics of magnetic dynamo signatures).

The first phase of Exercise\#1 is concerned with testing extraction of estimates of the large and small frequency spacings of the low-degree modes. These seismic frequency spacings will provide key results for complementing the exoplanet search data (e.g., see Stello et al. 2007a): the large spacings provide tight constraints for estimating radii of the exoplanet host stars, which may then be used to give precise estimates of the exoplanet radii; while the small spacings may be used to help constrain ages of the host stars. The ultimate goal of Exercise\#1 will be to estimate the 