NASA’s Institute of Advanced Concepts has provided a grant to a company called Positron Dynamics for the development of a novel type of nuclear fission fragment rocket engine (FFRE) Vitalii Lipovetskii Лют 15, 2023 Посилання 123 1 Share Telegram Twitter/X Facebook WhatsApp Copy Link Novel propulsion ideas for moving around space seem like they're a dime a dozen recently. ScienceAlert