DFT and the Mysteries of the Universe
Discover how the Discrete Fourier Transform (DFT) helps analyze non-visible electromagnetic waves from space. Learn its applications in studying planetary compositions, mapping stars, and supporting the search for extraterrestrial signals by processing time-domain samples into frequency spectra.
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One might think that we obtain information about the universe around us through the light from outer space. But remember that visible light is only a small portion of the electromagnetic spectrum. We can also acquire the non-visible parts of the spectrum and process them digitally after sampling. This is how we have gradually built a beautiful picture of the universe around us. DFT has played an integral role in creating that picture.
Study of planets
Some planets ...