The team used the ‘Very Large Telescope’ (VLT) of the European Southern Observatory in Chile. Through this, he observed the cross-section of the galaxy UGC 10738.
Astronomers have claimed that our Milky Way is slowly and silently formed. Till now it is believed that it is formed by colliding with other galaxies. Australia’s ARC Center of Excellence and the University of Sydney’s Astronomers have become more aware of the galaxy when it cross-sections a galaxy that looks like our own galaxy. Through this, they have also come to know how the Milky Way was built billions of years ago.
The team used the ‘Very Large Telescope’ (VLT) of the European Southern Observatory in Chile. Through this, he observed the cross-section of the galaxy UGC 10738. This showed that there are two disks in this galaxy like the Milky Way. It has one ‘thick’ and the other disc is ‘thin’. At the same time, old stars are present in thick discs, while small and young stars are located in thin discs. This is in contrast to earlier theories, which stated that such structures are not the result of a collision with a small galaxy, but rather a peaceful change.
A thick disc is also present in the Milky Way
The authors of this study say that this discovery is going to prove to be a ‘game-changer’, as it means that the Milky Way is not the result of a collision. The UGC 10738 galaxy is two million light years wide, exactly like the Milky Way. The Milky Way also has a thick disk, which contains ancient stars. The head of this project, Dr. Nicholas Scott, said, “Our observations show that the thin and thick discs of the Milky Way did not cause a huge collision, but were formed because of a default system of galaxy formation and evolution.” He said that these results suggest that galaxies that look like the Milky Way can be defined as normal.
Information can also be collected about distant galaxies
Dr. Scott explained that it was believed that thin and thick discs of the Milky Way formed after a violent collision and therefore probably would not be found in other spiral galaxies. But our research has said that this is wrong. He told that research has shown that this must have happened naturally. This means that galaxies like the Milky Way are very similar. Through this, we will also be able to get more detailed information about the galaxies which are far away from our galaxy. These results have been published in the Astrophysical Journal Letters.
Also read: When did our Galaxy Milky Way take its shape? Scientists have found answers to unresolved questions