3/4 The data was obtained with the MUSE instrument at the VLT. MUSE doesn't take images per se. Instead, it breaks the light coming from every single location within its field of view into a rainbow or spectrum, which tells us a lot about the physical properties of this object.
We can then reassemble all these spectra into thousands of images at different wavelengths: https://www.eso.org/public/videos/potw2423a/