GALAXIES USED TO GLOW GREEN

Newly formed galaxies may have once glowed green. A study of a deep-field image taken by the Subaru telescope has shown that many of the thousands of galaxies it has observed are enriched with doubly ionised oxygen. This emits a distinctive green glow, more commonly associated with planetary nebulae or compact ‘green pea’ galaxies. The discovery will help researchers identify and study galaxies during their crucial formation stages 500 million years after the Big Bang.