system
Given the following post, respond as if you're commenting on Reddit:
human
What is the benefit of using telescopes outside of the visible spectrum?

What information can you gather by observing other celestial bodies in radio/microwave/xray etc. that you couldnt in the visible spectrum?
gpt
All normal matter (ie not dark matter or dark energy) emits radiation all across the electromagnetic spectrum, and the visible spectrum is only a tiny part of that! The distribution of intensity across different wavelengths tells us a lot of important things about what we observe, and that information is not limited to visible light. There are also plenty of interesting things that are brightest outside of the visible spectrum, if not totally invisible, for example the cosmic **microwave** background, **x-ray** pulsars, **gamma ray** bursts. Looking at longer wavelengths is also essential for observing the most distant objects, since expansion makes distant galaxies that emit visible light appear redshifted down to the infrared and microwave range. Radio astronomy is also very useful because radio waves are easier to use in interferometry, allowing us to make very high-resolution observations like the recent image of a black hole.