Starship Daedalus
The world's first engineering study of an unmanned spaceship to explore one of the nearer stars was made by a technical group of the British Interplanetary Society between 1973-77.

The target selected for the exercise was Barnard's Star, nearly 6 light years from Earth.
Starship Wireframe
Entering Space Cover One of the Daedalus images was recently published in Robert Zubrin's book 'Entering Space'.

From the back cover:
Advance Praise for 'Entering Space'
"A great, visionary work. Many of its ideas and analysis are starting points for years of discussion. It is refreshing to see someone present a practical, step by step guide to seizing the stars."

James Cameron, Filmmaker