As was said few posts above, there was nothing, but if you want to know in details:
I sped away from the first system towards the other, it was locked and the star was inside the target circle. My speed went up to 2001c (I wonder if this is some connection to the Space Odyssey

), and stayed there.
As you know, when travelling betveen two stars in binary systems, you constantly accelerate until you are about halfway to the destination, at which point you start to gradually decelerate. This didn't happen.
When I was closer, some 2 000 000 Ls away from the (apparent) destination, I noticed that the star dot was not exactly in the center of the target circle and when I arrived there was nothing. The target circle was an empty space (just like if you targeted nav beacon or asteroid belt cluster) and I was unable to enter it (I tried but since there was nothing to "slow" my acceleration, even a click of my acceleration button catapulted me from the idling 30km/s to above light speed, meaning I was unable to approach to less than 1 Mm). At least we now know that the star field is just a background image with the neighboring star systems targets placed in such a way that they appear to be locked on a star dot.