By zooming out to see half of the sky and displaying the footprints from all the missions (visualised as squared in different colours), the users get a coverage map of all observations ever done from the X-ray to the far-infrared in one single map.
ESASky is a discovery portal that provides full access to the entire sky. The open-science application contains a universe of data – over half a million images, 300 000 spectra and more than one billion catalogue sources.