The video offers a detailed guide on handling FITS (Flexible Image Transport System) files in Python, with a focus on the Astropy library. FITS is a widely used data format in astronomy for storing images, spectra, and other scientific data. Each FITS file consists of Header Data Units (HDUs), which include a metadata-rich header and an optional data block. In Python, the Astropy library provides tools for opening and working with FITS files.
Please go through this Python notebook and complete all the exercises. A few additional resources are also linked here for your reference.
Additionally, software such as JS9 (online), DS9, CARTA, and QFITSViewer can be used to visualize FITS images. You can play around with them and pick your favorite one to use.