
U.S. Department of Energy @ENERGY
OUT OF THIS WORLD: This multi-mission radioisotope thermal electric generator is more than halfway to #Mars, powering @NASA_Persevere. So, what is an RTG and how does it work? Find out here: https://t.co/ob6ztXzgI6 https://t.co/nwuC1qOuT3 — PolitiTweet.org