Humans and the universe
The duo of scientists Joshua Kim and Mathew Madhavacheril of the University of Pennsylvania and colleagues at Lawrence Berkeley National Laboratory said they drew the above conclusion about the universe when reviewing two types of databases from sky surveys.
Data, published in the journal Journal of Cosmology and Astroparticle Physics and arXivcoming from the Atacama space telescope (ACT) and the Dark Energy Spectroscopy Instrument (DESI).
Expert Madhavacheril said combining data from ACT and DESI allowed the research team to arrange cosmic time in a way that is like superimposing ancient photos of the universe on top of more recent photos. thereby bringing a multi-dimensional perspective on the universe.
“With a view of 23% of the sky, ACT paints an image of the early universe thanks to the faint, distant light traveling from the Big Bang event,” according to the first author of the report. Joshua Kim. The image was recorded at a time when the universe was about 380,000 years old.
Meanwhile, DESI data provide a more recent record of the universe. Installed at the Kitt Peak National Observatory in Arizona and operated by Lawrence Berkeley National Laboratory, DESI maps the universe in three dimensions by studying the distribution of millions of galaxies, specifically especially bright red galaxies (LRG).
LRGs are galaxies that act as landmarks, allowing scientists to trace how matter spread across billions of years.
“DESI’s LRG team provides more recent images of the universe, showing how galaxies are distributed at different distances,” according to expert Kim.
By combining information from ACT and DESI in a process similar to a cosmic CT scan, the team of experts created a time series of the ancient and recent history of our universe.
