The ancient embryonic galaxy existed just 500 million years after the start of the universe.
It's a lot more hectic in the heart of our galaxy than scientists thought.
Scientists predict that the tiny moon will be destroyed within 30 to 50 million years.
The galaxy in question appears as it was 11 billion years ago, just 2.7 billion years after the Big Bang.
Einstein predicted that gravity and light could be used to calculate the mass of a star. But he never thought scientists could actually do it.
N6946-BH1 has left the universe.
The study suggests water is even more widespread than thought.