NASA

NASA @NASA

@owen_jj96 Astronauts on a spacewalk use safety tethers to keep them from floating away. They also have jet packs attached to their spacesuits that can be used to maneuver back to the station in the unlikely event they become untethered: https://t.co/25VeEs55Wx — PolitiTweet.org

NASA @NASA

Radio & GPS signals behave strangely when they travel through the polar cusp, a gap in Earth’s magnetic field. As spacecraft pass through this region, signals slow down. Our Cusp Region Experiment-2 sounding rocket mission is preparing to find out why: https://t.co/bprueM5N5E https://t.co/TcR0cN0Wfk — PolitiTweet.org