[Spaceships] getting into orbit without superscience?

[Emerikol]

I guess it all depends on how you define super science.

Since current scientific theory affirmatively declares FTL travel is not possible, anything allowing for FTL travel would be super science in my book.

But there are things that many scientists would not be surprised if they happened. So if you took a scientist 100 years into the future and we had FTL drives, that scientist would be surprised. One of the foundational theories he was taught as fact has been overturned in some way. This happens in the world of science. Newtonian mechanics were overturned by Einstein's relativistic mechanics. Scientists in Newtons day would be shocked by that. So even super science breakthroughs are not completely off the chart.

For me the next big scientific breakthrough that will change the very nature of space travel, and I expect it to happen at some point, is some sort of unified theory. Scientists are pursuing it right now. So while such an approach is "impossible" today, many think it is not forever out of reach. Unlike FTL drives. So I wouldn't call this super science. I'd call it speculative science for sure. We may never discover that theory. If we do though we can turn electrical power into gravitical thrust. We can probably bond new materials using strong and weak forces that we could never imagine creating now.

I suspect though that many would call the above super science because it is not yet possible. So your definition matters.