Universe is home to about 2 trillion galaxies, study says
DOI: 10.1063/PT.5.0210153
Science News : The estimated number of galaxies that exist or existed at one time in the observable universe just jumped about 10-fold. So say Christopher Conselice of the University of Nottingham and his colleagues, who have performed the first detailed census of galaxies in the cosmos. The researchers used a combination of ground- and space-based telescopes to look at a particular volume of the universe to see how it has evolved over time. Although perhaps as many as 2 trillion galaxies existed at one time, the researchers say, many of them have since collided and merged to create larger ones. Nevertheless, there are hordes of relatively tiny galaxies waiting to be discovered that can’t be imaged with current technology.
