Their study, published Monday in Nature Astronomy, describes Eos as a vast structure made mostly of molecular hydrogen — the key ingredient for forming stars and planets ... in space that surrounds ...

By Katrina Miller Stars and planets are born inside swirling clouds ... the cloud was found lurking some 300 light-years from our solar system and is as wide as 40 of Earth’s moons lined up ...

It's named Eos, after the Greek goddess of the dawn, and contains approximately 3,400 solar masses worth of gas.