A supermassive boson star surrounded by unseeable dark matter haloes. It appears as a transparent cosmic body with a surface escape velocity that equals or exceeds the speed of light.
Gravitational WavesRipples in space-time resulting from halo collisions. They are generally not noticeable by those still wearing organics, but can inflict random malfunctions in sensitive devices.
Accumulated MatterBoston star exerts powerful gravitational effects that can pull objects in its orbit towards itself. Material trapped within the star are not destroyed, but their light is emited as a soft bent light from the center, which is the only visual hint approaching ships get.
Dark Matter: Multiple virialized clumps of dark matter are bound together by gravity in subhalos surrounding the star. It can be collected for use exotic means of propulsion. Dark matter does not interact electromagnetically so cannot be seen with light.
Dyson moving in an orbit. Upon realizing the nature of the star, commanders conducted broad sweeps that mapped out a slice of the star's invisible horizon.
Taurus Exodus are made to locate and skim the subhalos to collect dark matter to power pearl bound ships.