Some limitations of optical telescopes are overcome by the use of Radio telescopes. Radio Telescope detects radio waves that come from space instead of light. Radio waves are a form of electromagnetic radiation. Radio waves are not scattered or blocked by the Earth’s atmosphere. The use of Radio waves to study space objects is called Radio Astronomy.
The radio waves detected by radio telescopes have frequencies that are different fro that of radio stations on Earth. And because it has a different frequency, Astronomer will know it is coming from space.
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https://sydewalka.com/radio-astronomy-and-satellites/
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