If you believe it. But space distances and nomenclature (naming equivalencies - Urantia names to earth counterparts) still remain a big problem. I did find some more info on possible errors with in our space measurements. But I missed copying it down. So I'll have to search again.
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P.166 - §8 7. The Grand Universe. Seven superuniverses make up the present organized grand universe, consisting of approximately seven trillion inhabitable worlds plus the architectural spheres and the one billion inhabited spheres of Havona. The superuniverses are ruled and administered indirectly and reflectively from Paradise by the Seven Master Spirits. The billion worlds of Havona are directly administered by the Eternals of Days, one such Supreme Trinity Personality presiding over each of these perfect spheres.
P.167 - §1 Excluding the Paradise-Havona spheres, the plan of universe organization provides for the following units:
P.167 - §2 Superuniverses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
P.167 - §3 Major sectors . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 70
P.167 - §4 Minor sectors . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7,000
P.167 - §5 Local universes . . . . . . . . . . . . . . . . . . . . . . . . . 700,000
P.167 - §6 Constellations . . . . . . . . . . . . . . . . . . . . . . . . 70,000,000
P.167 - §7 Local systems . . . . . . . . . . . . . . . .. . . . . . .7,000,000,000
P.167 - §8 Inhabitable planets . . . . . . . . . . . . . . . 7,000,000,000,000
P.167 - §9 Each of the seven superuniverses is constituted, approximately, as follows:
P.167 - §10 One system embraces, approximately . . . . . . . . . . . . . 1,000 worlds
P.167 - §11 One constellation (100 systems) . . . . . . . . . . . . . . ... 100,000 worlds
P.167 - §12 One universe (100 constellations) . . . . . . . . . . . . 10,000,000 worlds
P.167 - §13 One minor sector (100 universes) . . . . . . . . . . 1,000,000,000 worlds
P.167 - §14 One major sector (100 minor sectors) . . . . . 100,000,000,000 worlds
P.167 - §15 One superuniverse (10 major sectors) . . . . 1,000,000,000,000 worlds
P.167 - §16 All such estimates are approximations at best, for new systems are constantly evolving while other organizations are temporarily
passing out of material existence.
Visible space is currently approx. 28.57 billion light years.in diameter.
TUB says there’s approx. 7 trillion inhabitable worlds in the Grand Universe.
If what we’re seeing today was diameter of all the Grand Universe then the Grand Universe diameter of 28571428571.4285714285714285714286 light years divided by 7,000,000,000,000 inhabitable worlds would leave approx. 0.00408163265306122448979591836734694 light years diameter thickness of space extending spherical around that particular increment of the Grand Universe diameter you were on for each inhabitable planet. If a light year is approx. 5,874,526,080,000 miles long (aprrox. 6 trillion miles long) that would make the increments roughly 23977657469.3877551020408163265306 miles thick. (approx. 24 billion miles thick.)
The problem with averages is they often don’t help much in representing reality.
The first increment being roughly 14.3 billion light years from the outer edge of the visible universe to Virgo in the center would inscribe a very small sphere of space. While the last increment at the extreme outer edge of the universe would spherically inscribe an enormous spherical shell encapsulating all of the current visible universe. So we can see the inner shell would be so small it may not include a single inhabitable world. While the last would be so large it could contain a billion inhabitable worlds.
So if we use the spherical volume in Cu. Light years of the visible universe and divided that by 7 trillion inhabitable worlds we may get a better perspective average space density needed per inhabitable world IF (and that’s a BIG IF) what we currently see is the grand Universe. (Which of coarse I doubt.) But it worth doing the math and contemplating representative models of what it might be like. When you think about star clusters and gigantic space voids you can easily see that some areas of space could contain sufficiently more inhabitable worlds while other areas would be remarkable devoid of inhabitable worlds.
So then a simple ideas like aiming attempts at giving and receiving communication to the nearest star or star cluster might cross our mind. And maybe we’re doing just exactly that with our CETI, Voyager and other programs attempting First Contact.