Astronomers believe that for roughly 100 million years after the Big Bang, the Universe was an extremely dark place. There was no trace of any of the sparkling and beautiful stars that we see today across the night sky or by using powerful telescopes.
Of course, only God knows what happened before the Big Bang. Scientists have some trouble grasping the idea that everything that exists didn’t start at the Big Bang 13.7 billion years ago. But until such a profound dilemma, scientists want to understand when and how exactly did the first stars that illuminated the Cosmos were formed.
Star from dwarf galaxy could offer a hint for the Population III stars
Population III stars are those bright cosmic objects that we’re talking about, meaning the very first stars that ignited themselves in the Universe. According to ScienceAlert.com, a star located in a dwarf galaxy that orbits the Milky Way has a chemical composition that suggests the incorporation of elements belonging to one of those very first stars that illuminated the Cosmos.
We’re talking about the star dubbed AS0039, and it’s located 290,000 light-years away in the Sculptor dwarf spheroidal galaxy.
The analysis was made by Ása Skúladóttir, an astronomer of the University of Florence in Italy. He says that the star shows the lowest metallicity ever discovered beyond our own galaxy. AS0039 also shows the lowest carbon abundance that was ever found in any star.
As quoted by ScienceAlert.com, Skúladóttir says during a press statement:
We are in the presence of a secondary star with exceptional chemical characteristics: Low in iron, AS0039 is not even rich in carbon and has an extremely low amount of magnesium compared to other heavier elements, such as calcium.
Hopefully, astronomers will solve one day the long-lasting mystery of what existed before the Big Bang itself. Stephen Hawking made an assumption, saying that everything actually came from nothing because there was no time for anything to exist, but most scientists don’t agree. And of course, it’s just a theory.