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One
of the main problems of exploring the stellar systems
of the galaxy even for very advanced civilizations is that a serial journey
even at the speed of light would take so long time that most of the stars
would have died during the journey. One solution is to parallelize the
problem: the explorer travels to a new system,
creates a number of copies (xoxes) of himself and sends them to other systems, while he remains behind exploring the system (this is a variant of exploring the galaxy
using von Neumann machines). After around 10
million years, when all of the galaxy has been explored, the explorers gather
together at a prearranged place, and exchange or merge their memories
("The Far Edge Party"). This was proposed by Keith Henson as a
possible method for a single individual to visit all of the galaxy within a
reasonable time.
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