Objectives:
(1) What is the advantage of radio? (2) What are the basic constraints for interstellar spaceships? (3) How does the passage of time change aboard a fast spaceship? (4) Manned or robotic spacecraft?
(1) What is the advantage of radio?
(2) What are the basic constraints for interstellar spaceships?
(3) How does the passage of time change aboard a fast spaceship?
(4) Manned or robotic spacecraft?