Scientists find ‘ancient heart’ of Milky Way Galaxy, stars formed 12.5 billion years ago

Washington: Astrophysicists probing the origins of the Milky Way claim to have discovered the old heart of our galaxy. All its stars and planets have evolved around this original, ancient nucleus. The oldest stars in our galaxy are located in the Constellation Sagittarius, which is from the protogalaxy of the Milky Way. New data from the Gaia spacecraft reveal the oldest stars in the Milky Way, which formed 12.5 billion years ago. The rest of the galaxies developed around these.

Astronomer Hans Walter Ricks of the Max Planck Astronomy Institute in Heidelberg, Germany, claims, ‘It has long been speculated that large populations of older stars must be present at the center of our galaxy, and Gaia now shows that they are there. Huh.’ In a research published on arXiv.org on 7 September, Ricks and his colleagues show that the ancient heart of the Milky Way is a spherical protogalaxy, covering more than 18,000 light-years. A protogalaxy is a place from which a galaxy is believed to have evolved.
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“This study really helps to strengthen our understanding of the early phase of the Milky Way,” said astronomer Vasily Belokurov of Cambridge University who was not involved in the research. They claim that little is understood about the beginning of the Milky Way. Whereas the new study provides a greater understanding of the overall structure. He further explains that glimpses of these stars have been seen before.
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The Gaia satellite was launched in 2013 with the goal of mapping the Milky Way Galaxy. It was used by Ricks and his team. Researchers at the Sagittarius Constellation observed about two million stars with a metal-to-hydrogen ratio. After examining the motion of stars, the astronomers placed only those stars that did not move around the disk of the Milky Way in the halo of less metallic stars. In the end result astronomers have created a sample of 18,000 old stars, which represent the first nucleus of the Milky Way.