Which kind of interstellar spacecraft collects its fuel during its passage?

Question

Quizplus · Accepted Answer

The interstellar ramjet is the only spacecraft among the given options that collects its fuel during its voyage. It uses the interstellar medium – the sparse matter that fills the space between stars – as a fuel source. The spacecraft carries a scoop-like structure at its front, which scoops up interstellar hydrogen and compresses and heats it to generate thrust. This makes the interstellar ramjet a self-sustaining vehicle that does not need to carry its fuel, making it an attractive option for long interstellar journeys.

Which Kind of Interstellar Spacecraft Collects Its Fuel During Its