We present Kepler observations of the bright ( V=8.3 ) , oscillating star HD 179070 .
The observations show transit-like events which reveal that the star is orbited every 2.8 days by a small , 1.6 R _ { Earth } object .
Seismic studies of HD 179070 using short cadence Kepler observations show that HD 179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes .
Asteroseismic analysis provides robust values for the mass and radius of HD 179070 , 1.34 \pm 0.06 M _ { \odot } and 1.86 \pm 0.04 R _ { \odot } respectively , as well as yielding an age of 2.84 \pm 0.34 Gyr for this F5 subgiant .
Together with ground-based follow-up observations , analysis of the Kepler light curves and image data , and blend scenario models , we conservatively show at the > 99.7 % confidence level ( 3 \sigma ) that the transit event is caused by a 1.64 \pm 0.04 R _ { Earth } exoplanet in a 2.785755 \pm 0.000032 day orbit .
The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of \sim 10 M _ { Earth } ( 2- \sigma ) .
HD 179070 is the brightest exoplanet host star yet discovered by Kepler .