The following information I received years ago, however I have since misplaced the original source of the information, so read it for what it is worth. From my perspective however, it is among the most fascinating pieces of information I have ever come across:

"...The Source of all LIFE, the Creative Intelligence -- 'GOD' -- and His angelic legions, in service to the 'Son of God' or 'Melchizedek', have their universal headquarters within the 'New Jerusalem' Command, a literal 'CITY OF LIGHT' which has been observed emerging from within or beyond the Orion Nebula, which lies far beyond the Orion star cluster itself.

"This City of Light is on a direct course towards us, towards the SOL system, and at its calculated speed is due to pass through the Orion star cluster some years before the close of the current 'Millennium' (i.e. towards the approach of the year 3000?). It is due to reach our Solar system AT or NEAR the close of this Millennial period.

"According to Biblical prophecy, the 'Millennium' will be the thousand-year reign of Christ Jesus...

"The New Jerusalem is said to be a 3-leveled (or 'trinitarian' leveled) pyramidal city of LIGHT some 1500 miles high and 1500 miles wide. But of course, since we are talking about the abode of the Son of Almighty God Himself, the interior of this City of Light may be just as extensive as the Creator wishes it to be - another 'Universe' all in and of itself so-to-speak, since the Creator is not subject to the laws of time-space-matter, which He can bend or nullify at will from His dwelling-place in ETERNITY.

"In regards to the 'New Jerusalem' by the way, I have heard from a "Born Again" Pentecostal Evangelist, by the name of Don McCamish, that some of our scientists (friends of his in the government-aerospace industry) have observed through powerful electronic telescopes an incredible sight... a brilliant and beautiful multi-colored 'star' that has emerged from the Orion 'nebula' (which lies far beyond the Orion open star cluster - which is situated directly between us and the Orion 'Nebula' itself... the Nebula makes up a part of Orion's 'sword').

"Some theologians believe that this nebula contains a so-called 'Eternity Gate' leading to the infinite realm beyond this time-space-matter universe, a realm where the Almighty Creator has His source.

"It is interesting that this 'star' - mentioned above - is on a direct course to EARTH, a planet which seems to play a central role in the Universal drama... and since this 'star' is estimated to arrive in our part of space generally around the year 3000, some believe that this will be 'near' the time when the book of REVELATION apparently indicates that the 'New Jerusalem' - or the 'City of God' - will touch down on planet earth -- signifying the end of what the Bible calls the 'Millennium', and the beginning of the eternal increase (Luke 1:33) of the Kingdom of Light throughout the (new) heavens... presently the Universe/Omniverse is composed of billions of galaxies, many of these containing billions of stars just like our 'sun', SOL.

Many believe that this city is tent, or pyramid, shaped... and the book of Revelation states that it is approximately 1500 miles wide (foursquare)... and 1500 miles high! Jesus Himself, according to the WORD, is the CORNERSTONE of this 'city'. Many may not realize that the Egyptians refered to the CAPSTONE of their pyramid as the chief CORNERSTONE...

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MORE FASCINATING INFORMATION ON THE NEW JERUSALEM CAN BE FOUND HERE:
http://users.belgacom.net/gc674645/heaven/newjerus.htm (link no longer active)