The clusters of these 3 popular sky -watching stars can be the branches of the same family tree

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The three most popular targets of all skills are seven sisters (Pleiades), Hyades and Orion Nebula cluster (Onc), which is the central “star” orion sword.

Now scientists have found that these celestial bodies could have more in common than they once thought. Star clusters may have a common mechanism of origin, according to them, despite the fact that three groups are of different ages and are at different distances from the Earth.

This new study shows that looking at three groups of stars is as if to look at the three images of the same person made in three different stages of their lives, from infancy to old age.

The youngest of these open clusters is 2.5 million years old onc. It is about 1,350 light -years and packed thousands of young stars embedded in the stars cloud of them is one of the most active star formation in the bird trail.

Located 444 light -years from the ground, the Pleiades is less densely packed than onc, but it is much older at 100 million years. However, Hyades, at 151 light -years, has fewer stars that are even thinner and are about 700 million years old.

However, as different stars clusters look like, new team research shows that they have a certain ancestor.

“Our very accurate calculations of the dynamics of the star now have shown that all three stars clusters came from the same predecessor,” said Bonno researcher Pavel Kroupa team and university member.

Star clusters on the same space family tree

The team compares the various age and conditions of these three -star groups with the same person through photos that document their lives. The densely packed on on onc is a baby, the more scattered the pleads are a teenager, and Hyades is an elderly man.

Although three clusters have not formed from the same dense gas and dust molecular cloud, they can be compared to the same person born three times in different parts of the world.

“From this, we can find out that open -star clusters seem to have the desired way of star formation,” Kroupa explained. “It seems that there is a desired physical environment where the stars are formed when they develop in these clouds.”

The question is: How do the cluster, such as onc, develop into a like -like Pleiades and then grow old in the cluster like Hyades? Kroupa and colleagues, including team leader Ghasem Safaei from the Institute of Advanced Studies, identified the answer to this question by computer modeling.

Star clusters are getting older gracefully

Team modeling revealed the forces acting between the stars in the cluster. This allowed scientists to model such a stars collection of gas -rich, dense infancy life, gradually expanding and gradually expanding gas and stars loss of 800 million years.

The results that the team receives accurately reflected the changes in the structure and composition between the phases we see onc, Pleiades and Hyades.

“This study shows that stars clusters, such as Onc, are quite likely to go into the path of development that transforms them into systems such as Pleiades and later Hyades,” said Hosein Haghi, a research team and a researcher at the University of Bonn.

The results of the team showed that clusters like ONC can lose up to 85% of their stars populations and yet hang on to consistent structures when they reach age similar to hyades, walking through the stage, reminiscent of pleades.

Team study also shows that these three groups look close to the night in the sky above the ground, despite being widely separated in space, there may be more than a simple coincidence. This situation could actually be associated with the forms of star clusters and develop in relation to our galaxy.

“This study gives us a deeper understanding of how stars clusters shape and develop and illustrate the subtle balance between the inner dynamics and external forces such as gravitational pulling of the milk road,” a team member Akram Hasani Zonozi of the University of Bonnos.

Related stories:

– Habble Space Telescope reveals the richest view of the Andromeda Galaxy so far (image)

– Hablo telescope spy newborn stars on the famous Orion farm (photo)

-Nasa wants

In addition to the importance of research on our understanding of star clusters and their evolution, the team’s work shows the power to combine modeling with astronomical observations.

This study was published on Friday (July 18) in the reports of The Journal Monthly on the Royal Astronomical Society.