Enzmann starship

[2] The ball of frozen deuterium would fuel thermonuclear-powered pulse propulsion units, similar to Project Orion engines.

The spacecraft would be assembled in Earth orbit as part of a larger project preceded by interstellar probes and telescopic observation of target star systems.

[1] The Enzmann starship was detailed in the October 1973 issue of Analog, with a cover by space artist Rick Sternbach.

Enzmanns have been depicted by many space artists including Don Dixon, David A. Hardy, Syd Mead, Bob Eggleton, and Rick Sternbach.

Overall specifications have varied somewhat, but the design has nuclear pulse engines at the rear, then cylinders for human habitation, then closer the front a large ball of fuel.