Re: The empty universe
Hmm...
Wouldn't intergalactic space be that empty...? I was looking at that Atlas of the Universe site Marcia pointed to earlier and there are some spaces as large as 250 million LYs across, like the Bootes Void (next to the Bootes Supercluster of Galaxies).
250m LYs... Isn't that like 1.4x10^23 miles (much more than billion billion miles)?
The scale of our universe... I get speechless every time I think about it. It *is* indeed humbling!