1. Shape memory alloys can be used in Aeronautics and space devices. They can be used in low-temperature fittings in the hydraulic system of military aircraft. They can also be used to manufacture lunar antennas to explore the mysteries of the universe. 

2. People use shape memory alloys to make antennas at high temperatures and then compress them into a small iron ball at low temperatures, so that their volume can be reduced to one thousandth of the original size. Easy to transport to the moon, the sun's intense radiation makes it back to its original shape, according to the needs of the earth to send back valuable cosmic information.

3. In addition, a shape memory release device is used in the satellite to open the container, which is used to protect sensitive germanium detectors from contamination during assembly and launch.