Choose unnamed planet (system 0 planet 10 or something) aproach it then press rename type name (but there are limits i found that names like Sea of Whispers does not work i think it may be becouse of double space but am not sure) and press enter.
So the Asgaard and Babylon planets will be there forever.
Just like the Andromeda, Firefly, blue dwarf, red district, journey's end, ore belt, argon prime and some more sectors that I gave a name.
Can't remember all names I gave :P.
All the name will undergo moderation this week. If the name was appropriate for Starfall Tactics universe, was creative or unique, then it will be carried forward all the way! If not, it will be purged :)