How do space telescopes work??? How do all of these space telescopes work with frequencies other than visible light? For example, the Spitzer Space Telescope launched by NASA works on the Infrared frequency....but how? We can't see anything but visible light, so how does it convert infrared rediation into things we can see in wierd neon colours? Does it actually refract or reflect infrared in the same way that normal telescopes do with light? And if that does happen, how does it happen...because I don't think it will behave like light or do they use special lenses? If light travels to us from light years away, do all other EMRs do also? But I thought the EMR spectrum was unique to our sun. And as far as it goes with infrared radiation, (which are just heat radiations, right) they should be absorbed by surrounding dark matter before they reach us, right? And these questions are not restricted to only the Spitzer telescope. It is about all the space telescopes, including the Chandra X-ray Observatory, Hubble,etc. Any help will be appreciated.