**Fast Fourier Transformation (FFT)**

A Fourier Transform is the mathematical operation that takes measurements made with a radio interferometer and transforms them into an image of the radio sky. The Fast Fourier Transform is technique used by computer programs that allows the Fourier Transform to be computed very quickly.

By taking a Fast Fourier Transform of the gas cloud, we can detect faint structure in the cloud, though to be jets eminating from the nucleus.

Source: astro.keele.ac.uk , NASA

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