Amateur Radio on the International Space Station

Amateur Radio on the International Space Station (ARISS) is a program that facilitates radio communications between licensed amateur radio operators and crew members aboard the International Space Station using the amateur-satellite service. The primary goal of ARISS is "to promote exploration of science, technology, engineering, and mathematics topics" and inspire individuals to pursue careers in STEM. ARISS was established in 1996.

Source: Wikipedia — Amateur Radio on the International Space Station (CC BY-SA 4.0)