Allright, the 8 Sleeper ships

[joshua_cox]

From the looks of it, the Sleeper ships launched from one of Jupiter's moons. Titan, most likely. Everyone loves Titan. Although I can't remember if that's the ice one or the gassy one.

But anyway, my 2 theories are this:
The other Sleeper Ships were destroyed before liftoff
or
They launched, but they launched to a different sector.

Also, according to the wiki, Liberty launched first to arrive in Sirius. But unless it's that ship that goes into the blockade first, there's no way it could have started before the other ships. Even if it was the first ship, there was only a few seconds between its FTL Jump and the other ship's FTL Jumps.

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