Astronomers have shown one of the poorest clusters of stars

Using the Tubitac National Observatory (TUG) and the European Space Agency's Gaia satellite,

Turkish astronomers have studied Berkeley 68 and Stock 20, two galactic open clusters. The results of the study provide important information about the nature and properties of these stellar groups.

Open clusters (OCs) formed from oneand the same giant molecular cloud, are groups of stars that are weakly gravitationally bound to each other. To date, more than 1,000 of them have been discovered in the Milky Way, and scientists are still searching for more, hoping to find many more of these stellar constellations. Studying them in detail could be critical to improving our understanding of the formation and evolution of our galaxy.

Berkeley 68 is about 11,000 miles away.light years, its age is 2.1 billion years. It contains at least 1,200 stars and shows a low concentration of stars in the center. As for Stock 20, this cluster is located at a distance of about 8,500 light years in the second galactic quadrant. Its age is estimated at 19 million years.

Identification map of stars located in the Berkeley 68 (a) and Stock 20 (b) regions.
Image Credit & Copyright: Yontan, arXiv (2022). DOI: 10.48550/arxiv.2211.09825

First of all, scientists have determined the limitcluster radii for two PCs. It turned out that they are 22.8 and 20.7 light years for Berkeley 68 and Stock 20, respectively. Since then, astronomers have identified 198 stars in Berkeley 68 and 51 stars in Stock 20.

The study showed that the Berkeley 68 is older andlocated closer than previously thought. Its distance and age turned out to be approximately 9,800 light-years and 2.4 billion years, respectively. The astronomers also concluded that Berkeley 68 is at -0.13 and formed within a radius of about 33,000 light-years from the galactic center, a relatively metal-poor region of the Milky Way.

The results show that Stock 20 is about 9,500 light-years away and 50 million years old. The metallicity of RS is about −0.01.

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