Deep Astronomy - What is the Universe Expanding Into?

https://www.youtube.com/watch?v=kV33t8U6w28

From Feb 26, 2010.

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:

http://incompetech.com

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