1-14-21, National Astronomical Observatory Beijing-Arizona BASS survey team and the Dark Energy Spectral Survey DESI International Collaboration Project team jointly released the latest giant two-dimensional sky map of the universe. This is the largest cosmic sky map obtained by human measurement so far. 200 researchers from all over the world have spent 6 years on joint observation and data analysis, covering 20,000 square degrees of the sky, which is about half the area of the whole celestial sphere, accommodating 10 trillion digital pixels and containing 2 billion celestial objects.
