A Giant 2D Atlas of the Universe has been released to help with the upcoming new-generation dark energy spectroscopic survey.


The Beijing-Arizona Sky Survey (BASS) team of National Astronomical Observatories of Chinese Academy of Sciences (NAOC) and their collaborators of the Dark Energy Spectroscopic Instrument (DESI) project released a giant 2D map of the universe, which paves the way for the upcoming new-generation dark energy spectroscopic survey.

Modern astronomical observations reveal that the universe is expanding and appears to be accelerating. The power driving the expansion of the universe is called dark energy by astronomers. The dark energy is still a mystery and accounts for about 68% of the substance of the universe.

Large-scale redshift measurements of galaxies can describe the 3D distribution of the matter and reveal the effect of dark energy on the expansion of the universe.

The DESI project is a new-generation cosmological redshift survey. ZHAO Gongbo, Deputy Director-General of NAOC and a member of DESI, said "DESI will execute a five-year mission to obtain the redshifts of millions of galaxies and construct the largest 3D universe. It is expected to solve the mystery of dark energy."

"Before DESI begins, researchers need a larger and deeper 2D map of the universe to meet the targeting requirements of such large-scale spectroscopic observations," said ZOU Hu, one of the BASS co-PIs and an associate professor in NAOC.