Assertion: stanford torus | /r/HasProperty | proposed with the purpose
Facets:
value: during the 1975 nasa summer study
type: TEMPORAL
Source sentences:
text: The Stanford torus was proposed during the 1975 NASA Summer Study, conducted at Stanford University, with the purpose of exploring and speculating on designs for future space colonies (Gerard O'Neill later proposed his Island One or Bernal sphere as an alternative to the torus).