The discovery of Eos, the closest known molecular cloud to Earth and one of the largest structures in the night sky, hints at ...

describes Eos as a vast structure made mostly of molecular hydrogen — the key ingredient for forming stars and planets. What makes the discovery stand out, researchers say, is how it was made: by ...

The cloud, named Eos, is chock-full of molecular hydrogen and possibly rife with star-forming potential in the future.