Born in a black hole

摘要

Once upon a time, a vast cloud of cold gas was floating in the void of space, a patch of inert blackness against the even deeper blackness behind. Then, as if from nowhere, a thin jet of matter streaked towards it at ultra-high speed. It slammed into the cloud, compressing its matter and triggering a firestorm of star formation. What had once been a dormant gas cloud was now a full-blown galaxy.