Per Alex's Twitter:
Looks like a "gravimetric compass" to me. It tells you where the gravity fields of a local system are and relays it through the amplitude of an aura. Note the local star's gravity signature is essentially "north" and remains peaked. The planets, on the other hand, are much smaller but noticeable. The gas giant has a pretty strong signature. I count 6, maybe 7 signatures on the compass with something very small and/or far away at the 7 o'clock position.
I would imagine this would be really helpful in unexplored space (if there is such a thing as going in "blind.") Alternatively, it would be useful to chart more precise trips to planets and whatnot if you have to deviate from your original course.
I'm curious if large fleets have enough mass to register on such an ability (probably not) but if you're far enough away from planetary/stellar gravity wells, maybe? I think it's pretty cool though I wonder if it's a ship system, hull mod, or item that enables it. Or maybe every ship gets it?
