Big Dipper, Small dipper and Orion's belt - These are just some of the constellation of stars in the Milky Way galaxy that we commonly know about. But according to researchers, recently, astronomers have discovered the secrets of the powerful explosion that happened billions of years ago known as Hypernovas. Could they have ruled the Milky Way during its younger years?
As reported by CBS News, the most aged stars in the entire universe lack in "metals" or Helium. As these stars die of bursting, they are called Supernovas; spreading these "metals" to the galaxy. And as time passes by, new born stars become richer in helium than the previous ones.
13.6 billion Years ago, the first stars were born. And according to previous research, this might just have started the cosmic dawn. Astronomers haven't actually found out what the first star was yet, however, they believe that those stars that lack in "metal" content could possibly be the ancestors of the first star to have ever been seen in the Milky Way or around its outer regions.
Stars from the cosmic dawn
Louise Howes, who was the study's lead author, claims that the majority of the stars in the Milky Way are actually rich in metal since the central regions or "bulge" of the Milky Way is dense with gas and dust and, star formation happened so quickly here too. However, this also makes detecting of extremely metal-poor stars around the "bulge" of the Milky Way.
And in order to have a closer look of an approximately 5 million stars on the Milky Way's central region, researchers have used the Sky Mapper telescope of the Australian National University.
At the moment, experts still haven't seen any star that lacks in "metal" content around the galaxy since the Earth is located around the outer regions of the Milky Way and a there are a lot of interference that blocks off the view such as dust.
