We should probably get these long round-trip protocol issues ironed out before we build our galactic internet
I would encourage you all to look at the site dtnrg.org It's for the DTN research group, which among other things is beginning to architect and implement the so-called Interplanetary Internet. Some early trials have been run among NASA, ESA, and JAXA mission-control centers, as well as one flight test on EPOXI (used to be the Deep Impact mission)
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