Flexi Says: Radio astronomy is the study of space in the radio wave range of the electromagnetic spectrum. Radio waves are longer than visible light waves, and radio waves can pass through some materials that block visible light waves, including clouds. Radio telescopes on Earth and in space are used to detect radio wave emissions. Radio astronomy is especially helpful in studying objects such as quasars, pulsars, supernova remnants, star-forming regions, and black holes. Cosmic background radiation is also in the radio range. Astronomers study this leftover radiation from the Big Bang to learn more about the early stages of the universe.
