"Well, what else had we to do with the time between planets?"

There were always two or three on the ship working hard between planets to earn a place.

Nor was she willing to go home between planets.

There are several models possible, to interactions between molecules or planets.

We rarely use them; the journey between planets is too short.

The thought of warfare between planets at different star systems is even more impossible.

And they survive by sweeping up the extremely thin matter between planets.

You have the ability to travel between stars and planets.

Most notable is their ability to travel faster than the speed of light both around and between planets.

Secrecy and encryption were important, not only between planets but on them.