Kai James of Georgia Tech, a professor of aerospace engineering, notes that interstellar visitation faces no fundamental physical barrier but hundreds of stringent trade-offs, from Proxima Centauri's ~4.25 light-year distance and c… #aliens #ga #may2026 #ovni #theconversation #uap #ufo #ufosky #usa https://ufo-uap.news/gw2G.html