So, from time to time a science-fiction writer takes on the task of 'realistic' interstellar travel, constrained by the actual nature and scale of space-time.

He ends - when he might so easily have done so two hours previously - with a glimpse into a lecture about interstellar travel and footage from a performance of contemporary dance.

A handful of exceptions, notably faster-than-light interstellar travel and superluminal communication, depend on purely fictional or speculative principles.

Used in science fiction, the concept of hyperspace often refers to a parallel universe that can be used as a faster-than-light shortcut for interstellar travel.

Armed with the ability for interstellar travel, wars broke out that destroyed countless civilizations.