When=20the=20Milky=20Way=20and=20Andromeda=20merge =20in=20a=20few=
=20billion=20years,=20there=20will=20be=20essentia lly=20no=20star=
=20collisions.=20Lots=20of=20gravitational=20inter action=20but=20n=
o=20collisions.=20This=20is=20because=20star=20dim ensions=20are=20=
so=20vastly=20less=20than=20the=20distances=20betw een=20them.