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Astronomers have created the largest and most comprehensive "history book" of 265,000 galaxies in a single image, dating back 13.3 billion years, to only 500 million years ago. after the big bang.
They used 16 years of NASA space agency Hubble Space Telescope observations, synthesizing the evolution of the universe in a panoramic view, with nearly 7,500 exposures.
The portrait shows how galaxies change over time, becoming giant galaxies. The weakest and farthest galaxies are only one-ten billionth of the brightness of what the human eye can see, according to a NASA press release released this week.
The galaxies allow astronomers to follow the expansion of the universe, to give clues to the underlying physics of the cosmos, to show the origin of the chemical elements and to create the conditions that led to the appearance of our solar system and our life.
"This image contains the complete story of the growth of galaxies in the universe, from childhood until they became full-fledged" adults, "said Garth Illingworth of the University of California, Santa Cruz, leader of the team that assembled the image.
This new mosaic of images is the first in a series of images Hubble Legacy Field. The team is working on a second series of images, totaling more than 5,200 Hubble shows, in another area of the sky.
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