  We have reconstructed the galactic orbits of the parent stars of exoplanets.
For comparison, we have recalculated the galactic orbits of stars from the
Edvardsson et al.(1993) catalog. A comparison between the two samples indicates
that stars with planets are not kinematically peculiar. At each perigalactic
distance stars with planets have a metallicity systematically larger than the
average for the comparison sample. We argue that this result favors scenarios
where the presence of planets is the cause of the higher metallicity of stars
with planets.
