What is the Universe Expanding Into?

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By popular Space Fan request, I offer this video to help answer some of your questions regarding the expanding universe. Many of you consistently ask: If the universe is expanding, then what is it expanding into?

This concept is non-trivial to try and explain in a 5 minute YT video, but I do my best. I hope this helps!

Thanks to all of you space fans for watching this channel, it means a lot to me.

Music from Kevin MacLeod:

[reydecopas]

At the very end of the universe there is a tax and revenue office

[troy]

They could have shortened the video by just saying "I don't know" the end.

[ADEehrh]

500 million years... awwww universe baby pictures. We were so cute back then.

[drvetsaveyourpet]

So hypothetically if we could reach the edge (if one exists), what is there? I mean would we just go into nothing? Or is it like earth, where if you travel in a straight line long enough you end up back where you began? Space BLOWS MY MIND. It makes me sad that we won't ever see the very very beginning of it, or reach other galaxies in my lifetime. There's so many things I have questions about that I won't ever get an answer to and that kind of makes me depressed when I think about it too much.

[greensombrero]

Now I know why the space bar on my computer is the largest key. I get it now. Space is big.

[quetzalamaru]

Mean while, here on earth, we size our problems into politics, having no idea how insignificant we are to the size of this thing we intent to imagine - the universe.

[jago]

He needs to say 100 billion galaxies in the "observable" universe. There is absolutely no reason to believe we are at the center of everything and that there are no galaxies outside the distance we can see based on the light that has so far reached us.

[DantesInferno]

I wish I knew everything there was to know

[OwnageCubed]

This video really makes you think: "where the hell are we?"

[silence]

"Two things are infinite. The universe, and human stupidity, and I'm not sure about the former." -Albert Einstein

[superpeter]

I almost fell asleep listening to this

His voice is so calming

[mikebe]

It blows my mind to know that infinity space exists

[rxonmymind]

Wait! Wait! Before I watch this I know the answer....NO FRICKIN CLUE. 😁 Am I right?...

[universalstudios]

If we say that the universe has a boundary, what would we call the space/zone/area on the other side of that boundary? Is the outside not still considered as a part of the universe?

[MarcGoudreau]

Wow, the graphic sequences illustrating that fraction of the universe we've been able to map is awe inspiring. Beautifully done... many thanks.

[guibif]

There was a time
The universe didn't exist
Neither did that time.

[RobKMusic]

Reading through the comments section is incredibly sad.

[DeusShaggy]

Keep looking up. Keep looking out. Keep looking in.

[chiefseadawg]

The latest estimates I have read on the number of galaxies in the visible universe is 2 trillion, not 100 billion. But even 100 billion galaxies is a number that you just cannot rap your head around. The universe is indeed one huge and very mysterious place.

[paulhabib]

Considering the universe is a bounded infinity. From the observer's perspective, ours, the further we look away, the more we see into the beginning of space time. Since the universe is expanding into that direction, away from us, I suspect it is expanding, quite literally, into it's origins-the singularity from whence it spawned. The future is, in fact, becoming the past.