This is USS Enterprise D NCC-1701-D from Star Trek - The Next Generation. It's modeled in 1:100 scale. Only thing that is added in post processing is glow around nacelles, impulse engines, deflector and star background. It can easily be added by using gaussian blur on render element that renders only glow and stacking it on top of RGB render. One render element is for nacelles, impulse engines and other render element is for deflector.
Units are meters, but in 1:100 scale. 1m in file is 100 meters.
Rendered with Vray, edited in post processing in GIMP. Some objects are not unwrapped completely, but in sections. You can easily select faces by material ID and unwrap only them. Otherwise, if you unwrap whole object you will get incorrect mapping.