Abstract:
Kepler will detect Earth-like planets by monitoring 100,000 stars over four years for planetary transits. It is expected that if such ``Earths" are common, about 200 will be detected.
.
.
our studies have shown that a large fraction of the stars in the magnitude range of concern to Kepler may in fact be cool white dwarfs, from which the probability of a confusing event is small. Nevertheless, we acknowledge that a few per cent of the 200 Earths that Kepler is expected to find may be erroneous, and we urge travellers to confirm their hotel reservations directly before setting out to visit one of them.
  