The big bang. Like an explosion, speeds outwards. Then slows down. But due to gravity , when the slow down comes to a halt , it will start to collapse into itself again.
Trouble is. Recent measurements of distant galaxy's. 90 billion light years away.
That the speed of expansion is accelerating.
Cut it short. What is on the edge of the universe, and what is it expanding into?
Ps partial eclipse of the moon tonight cloud permitting.