But a vast amount of it will be spent in interplanetary doldrums, waiting to arrive at the destination.
The plan is to mine asteroids to be used on Earth and for interplanetary travel.
Any writer is wrong who indulges in interplanetary love affairs and mad passions.
And you actually got interplanetary Life to give you a mortgage on the structure?
It seems to me that interplanetary stories offer the best vehicle for all the desirable qualities herein enumerated combined.
I like interplanetary stories, if not written too far into the future.
interplanetary drive is rugged and sure, but it does not respond to fine adjustment.
Without it, interplanetary flight would have been impossible.
The question is: How did this strange substance get into the tube of an interplanetary rocket called the Astra?
He couldn't tell an interplanetary ship from an interstellar.