"Er... yes, it refers to certain humans that have undergone special training to travel through the stars on spacecraft. It's not something they've perfected, but I think expense is always an issue..."

Admittedly, she hadn't given it too much thought, but the knowledge itself was there, in part because of travel being a specialty of hers and knowing it well as a concept of what some aspired to, even if any personal aspirations she had were muddled at best. As for Gale, he still fell into the category of interesting, even if she could sometimes detect a more superior way of speaking from him.