[ELI5] If the beginning of the universe was 13B+ years ago, how is the boundry of the universe 46.5B ly away?
In: 7
This is a tough concept to explain in an ELIF… But here we go.
Think of a Balloon. If you blow it up a little and put two marker dots on it and measure the distance between those dots it; s one distance. If you put more air into the balloon the dots are further apart… More even more distance.
The universe is kind of like this. It is doing something we call expanding. Much like the surface of a Balloon expands.
The why to that is the complicated part.
Just know that what was a million miles 10 billion years ago is more than A million miles today. We exist on the surface of an expanding universe balloon.
Latest Answers