Researchers at the Canary Institute of Astrophysics spent almost 3 years to create the deepest image of the universe. To do this, we had to restore a huge amount of “lost” light around the largest galaxies in the Hubble Ultra-Deep Field survey.
To get the most detailed picture of outer space, scientists used original photographs of the Hubble Space Telescope. By combining several images, the group was able to recover a large amount of light from the outer zones of the largest galaxies. After adding light from the star on the outer zones, it became clear that some galaxies are almost twice as large in diameter as the early indicators. HUDF (Hubble Ultra-Deep Field) - the result of combining hundreds of images from the Hubble wide-angle camera 3 (WFC3), which has more than 230 hours of observations. Due to this, in 2012, managed to get the deepest image of the universe until this point. The method of combining individual images was not ideal, because weak objects were lost. Therefore, the researchers carefully looked through the archive, and improved the merging process.
The WFC3 camera was installed on the Hubble telescope in May 2003. To this end, a group of astronauts was sent to the 19-year-old device (at that time). On Earth, it was difficult to check the calibration, so after thousands of pictures of space, engineers knew what improvements to make.
