Unhappily, Zee Prime began collecting interstellar hydrogen out of which to build a small star of his own.

A big one, a ring-shaped one with a ramscoop field to pick up interstellar hydrogen.

Therefore the Pioneer carried braking fuel, condensed en route from interstellar hydrogen.

Fusion drive, but you get your fuel by scooping up interstellar hydrogen.

Edward Sinclair did some mathematics on the fields that scoop up interstellar hydrogen for the cargo ramrobots.

The field scoops up interstellar hydrogen to feed a fusion-pumped laser.

Though his ship carried a model of mankind's first "safe" ramscoop, he was not yet moving fast enough to use interstellar hydrogen for fuel.

It funneled interstellar hydrogen and icy dust microparticles into the fusion drive section at the core of the slowboat.

It picks up interstellar hydrogen in a path three thousand miles across.

These ships were intended to fuel themselves, picking up interstellar hydrogen in scoops of electromagnetic force.