When we think about the first stages of the Universe, the first thing that pops into the mind is a bunch of particles that wander around chaotically. But in reality, it all happened in a different way, at least according to an international team of astronomers who analyzed 118 galaxies by using ALMA (the Atacama Large Millimeter/submillimeter Array).
The conclusion is that when the Universe was only 1 billion to 1.5 billion years old, most of the galaxies had faced a sudden increase in development. During this short time for the Universe, the galaxies built up most of the stellar mass, dust, heavy elements, and more of the properties for such kind of space objects.
Daniel Schaerer of the University of Geneva in Switzerland, declared:
From previous studies, we understood that such young galaxies are dust-poor,
However, we find around 20 percent of the galaxies that assembled during this early epoch are already very dusty and a significant fraction of the ultraviolet light from newborn stars is already hidden by this dust,
The Big Bang might not be the beginning
Although astronomers and astrophysicists measure time since the Big Bang, that event may not actually be the beginning of all that exists. Some scientists are voting for a Big Bounce instead, meaning that other universes existed before our own. Each of them has ended by collapsing back into their own gravity, a phenomenon that opposes the Big Bang itself. For a long time, it was a mystery in science why the space objects from our Universe aren’t collapsing back towards the singularity from where they came from, but a little piece of the puzzle was found in the form of Dark Energy.
Trying to understand how it was possible for a ‘bang’ to create order and the vastness of our physical existence is perhaps the biggest challenge in science.