David Fernández via Starlink wrote:
    > Wondering what benefit would have for any space agency to move its DNS
    > root server "up there"?

Probably very little.

    > Is GEO an option?

The delay up to GEO and back is pretty long.
LEO would be better, but doesn't stay in the same place for many.
But, how often do you need to query root name servers if you cache well?

But, advantages that I can see:

1) power.  uninterrupted, disjoint from terrestrial infrastructure.
2) so available all over a hemisphere despite whatever disaster occurs.
3) can answer queries from other space situated systems.