Categories
Hypothetical spacecraft
Topic: Category
From Wikipedia - Reading time: 1 min
These are hypothetical concepts for spacecraft, rather than serious design concepts or budgeted proposals. They are not, however, mere fictional ideas; they are serious theoretical explorations.
Licensed under CC BY-SA 3.0 | Source: https://en.wikipedia.org/wiki/Category:Hypothetical_spacecraft6 views | ↧ Download as ZWI file
EncycloReader
is supported by the 
KSF