Jumping on the ID bandwagon, here's my interpretation:
The USS Sieglinde faces a new threat emerging from the Betreka Nebula. The Galor class warship will be a common sight for the upcoming decades, leading the Federation to design the Nebula and Galaxy classes as countermeasure. But here nad now, at the onset of the Cardassian War, the sight fills with terror even the veterans of the Sieglinde...
Models by me
Background by NASA