But he could only get the botanicals by trading them for a specific mineral that formed on low-gravity planets with an argon atmosphere.

A large but fragile winged insect-like being from the very low-gravity planet Cinruss.

Interplanetary get-togethers are always held on a low-gravity planet and always will be.

Ryxi have a long life span on low-gravity planets," Varian said, "but it's a chance we've got to risk.

Kirk sized up their tall, muscular frames, and thanked his lucky stars they were from a low-gravity planet.

Ceta, large, low-gravity planet that it was, had huge virgin areas.

I know that some people think it must be very entertaining to walk around on an airless, low-gravity planet in spacesuits.

The spacehand had obviously learned his fighting techniques aboard ship or on a low-gravity planet.

They were soaring through the air together in a great floating stride, like spacemen on a low-gravity planet.

She still had her wings, rolled up in her locker, just in case they had shore leave on a low-gravity planet.