The observable universe. Does it mean the edge of space where nothing else is? Is it where the universe is currently at in its expansion after the big bang? Or is it just a barrier that our telescopes are yet to look beyond, and there are just more galaxies past it?
In: 34
The universe is about 14 billion years old. Light has therefore had about 14 billion years to reach Earth, so we can see as far as 14 billion light years. Because the universe is expanding faster than the speed of light, anything further away than that is too far for the light to ever reach us.
That ‘bubble’ with a radius of fourteen billion light years is the observable universe.
Latest Answers