They’d have their own processes and techniques, but on some level they’d have to be discovering the properties of reality, then using that knowledge to create v

They’d have their own processes and techniques, but on some level they’d have to be discovering the properties of reality, then using that knowledge to create vessels that could travel between stars, slow down to visit planets, and do various other tricks that seem to defy physics as we know it (based on UAP observations). To me that’s still science and engineering even if it was done in completely different ways.