radio astronomy...:)
Radio telescopes.
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radio astronomy
radio astronomy
radio waves
Most stars and many other objects in space emit radio and microwave radiation. Even the big bag emitted electromagnetic radiation.
A radio telescope.
Radio waves are often referred to as space waves because they have the ability to move through space. Radio waves are a type of electromagnetic radiation.
Radio waves travel through empty space because they are electromagnetic waves, whereas sound is a wave that must travel through air.
radio waves
Radio Waves! (: