There is also a range of books, software, DVDs, and other learning materials suitable for both novice and experienced astronomers. There are also a number of lectures and workshops given by experts, and sometimes you can try out the different telescopes. However, new technologies, inventions, and research results can also be presented. An important trade fair for astronomical instruments is the Celestron Astronomy Fair in Germany or the SPIE Astronomical Telescopes + Instrumentation, which is held at different locations and accompanied by conferences.
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