From the Webb telescope one of the deepest images of the universe

More than 2,500 galaxies packed into a small patch of sky have been revealed in one of the deepest images of the universe ever obtained. Some galaxies date back to the dawn of cosmic history and will allow astronomers to study how they formed and evolved over billions of years. The image was obtained by the James Webb Space Telescope of NASA, the European Space Agency (ESA), and the Canadian Space Agency (CSA), thanks to an observation lasting nearly 100 hours : it is the longest conducted by the JWST with a single filter, one for wavelengths shorter than the mid-infrared.

The different colors represent different types of infrared light . Orange and red identify galaxies with high concentrations of dust, abundant star formation, or an active galactic nucleus at their center, which therefore emit more light at longer wavelengths. The small white and green galaxies are the most distant, but the image is dominated mostly by blue and light-blue galaxies, which emit light at shorter wavelengths.

This corner of the sky is the same one that first made NASA and ESA's Hubble Space Telescope famous: it is the so-called 'Hubble Ultra Deep Field ', a small region of space , just one-tenth the size of the disk of the full Moon as seen from Earth, in the constellation of Fornax , created using data collected by Hubble between September 2003 and January 2004. Webb, as his successor, continues and expands the tradition of deep fields by revealing new details, discovering previously hidden galaxies and shedding light on the first structures that formed in the universe.