Largest 3D cosmic map with 7.5M galaxies released

0 Comment(s)Print E-mail Xinhua, January 16, 2022
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An international team including Chinese astronomers has created the largest 3D map with most details of the universe -- marking a step closer for man to understanding the expansion of the universe and galaxy formation and evolution.

The researchers cataloged more than 7.5 million galaxies, beating the previous largest galaxy survey by the Sloan Digital Sky Survey, according to the latest news release by the Chinese Academy of Sciences (CAS).

However, the stunning picture they published, with the earth at the center and the farthest galaxies plotted at distances of 10 billion light years, was only about 10 percent of the way through their five-year mission to obtain spectra of over 35 million galaxies by 2026.

Chinese scientists at the National Astronomical Observatories under the CAS, along with their international collaborators from the United States, Spain, Britain and France, released a huge 2D map of the universe in January 2021.

Based on the 2D map, they started to observe the redshifts of those galaxies in order to estimate how far they are away from the Earth.

The large-scale redshift observations can help figure out the locations of galaxies, and reveal the nature of dark energy that may result in the universe expansion, the researchers said. 

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