"Astronomers have known since the 1700s that a significant fraction of stars belong to binary or multiple systems. But what is that fraction? Given the observed fact that most solar-size and larger stars reside in binaries, many astronomers have concluded that more than half of our galaxy's stars belong to multiple-star systems. But a new study by Charles Lada (Harvard-Smithsonian Center for Astrophysics) shows that conventional wisdom is almost certainly wrong. "
  