Quote - ...two Star Trek vessels come to mind - the 'planet-killer' that someone's noted, and I'm pretty sure there was an asteroid-sized generation starship in one of the episodes as well.

Yep, forgot about that one, Yonada built by the Fabrini from "For the World is Hollow, and I have Touched the Sky".  The same painting (prop?) was portrayed as a "killer" asteroid in "The Paradise Syndrome".  I can't remember which episode was filmed first (thus establishing the "rock's" original production purpose).

Sincerely,

Bill

Tempt the Hand of Fate and it'll give you the "finger"!