Space – I came across the article “Here Is the Future of Interstellar Spacecraft” yesterday and thought it was a good overview of the propulsion technologies that are likely to take future spacecraft beyond the Solar System.
In short the alternatives that are covered are:
- Thermonuclear propulsion
- Bussard ramjet
- Antimatter rockets
- NASA’s Eagleworks Lab “Warp bubble” drive
None of these are really going to be ready in the near future, with possibly the exception of the Lightsail. I am glad to see though that the ideas are being kept in front of people, particularly those budding STEM students who will lead the way over the next few decades.