Radio Astronomy Is a Different Way to Look at the Universe

In the thirties, radio astronomy was accidentally invented. We were trying to look at the entire universe only through like the visible light spectrum. Everything that interacts electromagnetically gives off some kind of light. If you are cold enough, then you glow at longer and longer temperatures which are not visible. In the radio spectr longer wave lengths are less obstructed bu like small particles and stuff. So let's you see through different things because every object is transparent or opaque at different frequencies.