... Star Atlas . ... Sky Events . ... Tiny ancient galaxy preserves record of catastrophic event . New observations of Reticulum II show that heavy elements are likely left over from rare collisions between two neutron stars. ... New observations of a tiny galaxy discovered last year show that these heavy elements are likely left over from rare collisions between two neutron stars. ... Because this galaxy is so small, it preserves evidence of ancient rare events incredibly cleanly, said Simon. ...