There& #39;s enough empty space in our solar system to fit every star in the galaxy within its volume

120 AU diameter gives you over 200 billion Sun& #39;s worth of volume, but 160 AU diameter gives you 5 trillion. However, definitions of the solar system& #39;s diameter can be up to several 10,000s AU(!)

Even on the lower end of definitions on the solar system& #39;s size this works. There are 0.2 trillion stars in our galaxy: for a 400 AU diameter solar system you& #39;d fit 80 trillion Suns of volume. At 1000 AU diameter = 1,250 trillion. 200 AU diameter should be more than enough tho.