Lilo Bad analogy time. If you look through a wire-screen door/window, you can only see half of what's on the other side. But if you move your head left and right quickly, you see the whole thing. Your brain is averaging the multiple views where it can only see half at a time and compositing the entire view .. even though at any one time, it could never see it all.
Kinda the same. As the Seestar can technically move it's sky position by less than 1 pixel, it can actually mathematically obtain a higher resolution than the native sensor size, but at the cost of needing more frames/exposures. It already does these moves as part of dithering (used to average out fixed point noise by), so by being a little sneaky, the above can also be done.
It's called 'drizzling' and has been a things in astrophotography for ages. See wikipedia or cloudy nights for a full explanation, as my analogy is ... well a bit ... hmmm ;-)
