First you have to ask yourself several questions: what do you want to see, at what time and at what

Since everyone has the impression that it is the Sun that revolves around the Earth, men use it to calculate

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It was to solve the problem of spatial resolution that in 1960 William E.Gordon of Cornell University proposed to build

Apart from optical telescopes equipped with their detectors and other spectrographs, to carry out their research, astronomers also need theoretical