What is Radio waves?
Radio waves meaning Part of the electromagnetic spectrum. Radio waves are around us here on Earth, and they’re out in space too. These waves are low energy. We use them every time we listen to the radio. They’re used to talk to satellites, too. They are also common in outer space, since they are sent out by forming stars, pulsars, supernovae, the sun, and even colliding galaxies.
reference: NASA Space Place – Glossary