The galaxy, spotted with ALMA, had been obscured by a huge cloud of dust, making it invisible to other telescopes.
Researchers led by Christina Williams, an astronomer from the University of Arizona, were carrying out observations with ALMA when they saw a faint light coming from an unknown source."It was very mysterious because the light seemed not to be linked to any known galaxy at all,""When I saw this galaxy was invisible at any other wavelength, I got really excited because it meant that it was probably really far away and hidden by clouds of dust.
Massive galaxies from the early universe pose a problem for astronomers as their existence do not fit with current theories of galaxy formation., the universe is thought to have expanded and cooled, eventually leading to the formation of the first atoms. About two million years later, the first stars and galaxies started to develop from clouds of gas.
As a result, these huge galaxies are underrepresented—it is thought we are missing about 90 percent of the galaxies in the universe. In August, for example, a separate team of scientists led by Tao Wang, from the University of Tokyo, Japan,The latest discovery may go some way to rectifying this, the team say. This is because they appear to have found a galaxy that is still forming."Our hidden monster galaxy has precisely the right ingredients to be that missing link," Williams said.
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