Comparison of nominal minimal distance from the Sun and spread of star clones at their closest approach for seven stars mentioned in this paper. Black dots in the center of each clone cloud mark the nominal star position at the closest Sun–star approach; see text on how this composite figure was obtained. All 10 000 clones of star C are hidden under its black dot because the stellar data are extremely precise in this case. Label meanings: A: P0509, B: P0230 (HD 7977), C: P0107 (Gliese 710), D: P0506, E: P0508, F: P0417 (Ton 214), G: P0111 (HIP 94512); see Table 2 for details of each star. The blue circle marks the habitually adopted outer limit of the Oort cloud.