Glossary
Galaxy - a group of billions of stars, gas and dust
Milky way - Our home galaxy
Light year - the distance that light can travel in a year
Black hole - a point of infinite density which curves spacetime such that not even light can escape if it gets too close
Event Horizon - the surface of a black hole beyond which not even light can escape
this story is written by Storm Colloms for the University of Edinburgh 2021/22