Here are the seeds for the official galaxies (1 - 8):
Galaxy 1: 5A 4A 02 48 B7 53
Galaxy 2: B4 94 04 90 6F A6
Galaxy 3: 69 29 08 21 DE 4D
Galaxy 4: D2 52 10 42 BD 9A
Galaxy 5: A5 A4 20 84 7B 35
Galaxy 6: 4B 49 40 09 F6 6A
Galaxy 7: 96 92 80 12 ED D4
Galaxy 8: 2D 25 01 24 DB A9
(I have learned those by looking at the bytes 0E-13 in the SARA cheat; 0D is just the number of the galaxy that is displayed; i.e. if you change 0D to 01, it will display "galaxy 2", but the galaxy will have the contents of the seed following in the bytes 0E-13. So, if you write 01 5A 4A 02 48 B7 53, it will _display_ galaxy 2, but you'll actually be in galaxy 1).
What can be learned from these numbers?! Not much, I fear

Each galaxy is _almost_ double the value of the previous one; but not exactly (left shifting yields no different results; and I have experimented with different endian different datatypes i.e. 2-byte values; no luck; it's just not _exactly_ twice the value).
We can also see that galaxies 5-8 are "mirrors" of galaxies 1-4. So, if we can determine an "intended" (or logical) galaxy 9, this would mean, a logical galaxy 10 would also exist. (Mirror of galaxy 9).
If, however, we look at byte 3 for each galaxy seed (02, 04, 08, 10, 20, 40, 80, 01), it is clear that the sequence is already complete. Hence, we don't have a "logical" galaxy 9.
As I have stated before though (and as you all know, I suppose), we can have "unlimited" galaxies by setting these bytes to all values from 00 00 00 00 00 00 to FF FF FF FF FF FF...
So, I can personally rest the case for "Galaxy 9": In the Amiga version, no galaxy 9 exists. Other thoughts?
(N.b.: It might be interesting for you to know that "Human Colonial" and -- surprisingly -- "Slimy Lizard" are the _only_ life forms present in all 8 galaxies (!), and "Humal Colonial" is the most common by far.
In total, however, 470 distinct races exist in the 8 galaxies and most of them occur on only one single planet....
Just a short extract from my database; I am going to publish the findings in more detail as soon as I have completed it

)