Out of an estimated 100 billion stars in our galaxy, no more than 14 may be made from antimatter. That’s the result from a new study that scoured the Milky Way for signs of antistars — which are identical to regular stars save for the fact that they would burn antimatter at their cores. 

Though the findings turned up mostly empty this time, researchers haven’t yet fully ruled out the existence of antistars, whose presence would change much about our understanding of the universe.