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Well, that might depend on exactly what definitions you use. SETI itself is a broad program. In this answer I'll focus solely on what I consider the most iconic part of modern SETI, which is SETI@home. We have the following quote from SETI@home's webpage (emphasis their own): SETI (Search for Extraterrestrial Intelligence) is a scientific area whose ...


6

They're not different. Same principles do apply. You could have secondary, tertiary, quaternary, and so on, mirrors with instruments at any wavelength, either optical, or radio, or infrared, etc. You could also have instrumentation placed directly in prime focus (so no mirrors other than the primary) with any kind of instrument - radio or infrared or visible ...


1

One of the reasons for the difference is the sheer number of different optical (and near-infrared) instruments available. Most professional optical telescopes have two or more standard instruments (e.g., an imager and a spectrograph), with the possibility of adding guest instruments from time to time; some have as many as five standard instruments at the ...


1

China is pretty well integrated into modern astronomy -- there are regular international conferences held in China (the most recent General Assembly of the International Astronomical Union was held in Beijing in 2012), lots of Chinese astronomers at other international conferences, Chinese participation in international observatory projects (the Joint ...


0

Radio telescopes are shaped differently primarily because we can't see microwaves or radio waves. Optical telescopes are designed so that there is a focal point where you can look and see the image. However, radio telescopes and optical telescopes actually work very similarly, and sometimes radio telescopes do have secondary reflectors. In an optical ...


2

There are tons a amateur radio astronomy clubs and groups. Radio Astronomy was basically started by an amateur named Grote Reber, where he basically did the experiment that you are pondering to do in 1937 in his backyard in Wheaton, Illinois. You can visit that exact instrument at the NRAO facility in Green Bank, West Virginia. It was named a National ...



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