Because they provide data that other types of telescopes do not. We have X-ray telescopes. We have infrared telescopes. We have optical telescopes. Also as a bonus, for ground based radio telescopes, we can use them 24/7 instead of waiting for nighttime.
Because they provide data that other types of telescopes do not. We have X-ray telescopes. We have infrared telescopes. We have optical telescopes. Also as a bonus, for ground based radio telescopes, we can use them 24/7 instead of waiting for nighttime.