Vorlon Planet Killer
A Vorlon Planet Killer is a massive starship used by the Vorlons for orbital bombardment.
A VPK is capable of rendering a planet uninhabitable within a few hours, but evidence indicates that it is not a planet destroyer, as multiple VPK attacks left survivors on the surface of the target planet; calls were issued for ships that could land on the planets to rescue these survivors.
These vessels are roughly disk shaped, with a diameter between 3 and 4 miles (4.8 to 6.4 km).
The Vorlons are known to have had at least two of these ships in their fleet.