Jeff Freedman. Space-industry engineer and entrepreneur — PhD, 30+ patents. Founded RKF Engineering and Kythera Space Solutions (sold 2025). Now writing hard science fiction and working out whether future technologies could actually be built.YouTube: https://www.youtube.com/@Sci-NoFi
Blog: [article site URL]: https://www.jfreedman.space/
Contact: arnoldspark@yahoo.com