Kitty10101 Kitty10101 02-05-2017 Biology contestada Astronomers study radio waves to learn about the universe. Why might radio waves be used to study objects in space? They are sound waves that cause vibrations in stars and planets. They are longitudinal waves, which create compressions in the fabric of space. They are electromagnetic waves, so they don't require a medium. They are mechanical waves that pass through interstellar particles.