Editing Stanford torus (section)

==World ship proposal==
In 2012 paper ''World Ships - Architectures & Feasibility Revisited'', a [[generation ship]] (also called world ship) based on Stanford torus was proposed. Stanford torus was chosen over O'Neill colony designs  because of its detailed design, that covers in depth aspects such as life support systems and wall thickness.
 
Four Stanford torus colonies would be stacked together, each with a population of 25,000 (bigger than the population of 10,000 for the original Stanford torus, while keeping the original general design and dimensions, and almost the same mass, that is increased by only 10% to 11 million tones), for a total population of 100,000, that is the minimum population size that the paper considers for a world ship. 

For propulsion system, the one designed in [[Project Daedalus]] was chosen, to be used in combination with the Stanford torus, being attached to the center of the torus. Daedalus would provide other additional features, such as power generation and a dust shield to protect the Stanford Torus from interstellar dust impacts.<ref name="hein-pak-putz-revisited">{{cite journal |last1=Hein |first1=Andreas M. |last2=Pak |first2=Mikhail |last3=Pütz |first3=Daniel |last4=Bühler |first4=Christian |last5=Reiss |first5=Philipp |title=World ships—architectures & feasibility revisited |journal=Journal of the British Interplanetary Society |date=2012 |volume=65 |issue=4 |page=119|url=https://www.researchgate.net/publication/236177990 }}</ref>