Many say that "If mankind is the only intelligent life in the universe, then the universe is a terrible waste of space". But the universe is a terrible waste of space, anyway. Consider:

If the solar system was scaled down to a point that earth was the size of a marble, the sun would be 4 1/2 feet in diameter. That puts the earth in orbit 579 feet from the sun. (This is explained in the video I linked to below).

So, I did some math on my own and came up with the following:
The sun is 1 "astronomical unit" away. Our nearest star, Proxima Centuri is 4.25 light years away, which equates to 268,770 AUs.
That means that in the scale of the solar system where the sun is 4 1/2 feet in diameter and the earth is a marble - our nearest star is 268,770 times 579 feet away. SO..............

The sun would be 579 feet away.
PRoxima Centauri would 29,473 miles away.

Again, the universe is an EMPTY place. But it is an inconceivably huge place as well.

https://kera.pbslearningmedia.org/re...-0S750mw0Ymdxw