Hubble Space Telescope reveals dwarf galaxies expel most of the oxygen produced by their stars

New research from NASA's Hubble Space Telescope indicates that small dwarf galaxies, which contain anywhere from a few thousand to hundreds of millions of stars, retain only about 11 percent of the oxygen produced by their stars. This suggests that if most of the missing oxygen did escape, the universe's smallest galaxies may be significant contributors to seeding space with the element that is crucial for life.