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Alien stars found in our Milky Way | Space


May 25, 2021
Infrared image of stars at the center of our Milky Way galaxy, via the Spitzer Space Telescope. Observing in infrared makes it possible to peer behind the gas clouds that otherwise cover the central region of the galaxy. There are around 10 million stars within just 3.3 light-years of the galactic center. These are dominated by red giants, the same kind of old stars found to be from another galaxy in this study. Image via NASA/ JPL-Caltech/ S. Stolovy (SSC/Caltech).
Astronomers used a new technique – asteroseismology combined with spectroscopy – to pinpoint the ages of a sample of around 100 old red giant stars in the Milky Way. They were able to reach a much higher accuracy of the stars’ ages, they said in a statement on May 17, 2021. And they also found that a number of those red giant stars did not originate in the Milky Way! They are instead alien stars, which came here from another galaxy. Their original home in space was Gaia Enceladus (also known ....

Andrea Miglio , Gaia Enceladus , Josefina Montalb , University Of Birmingham , University Of Bologna , Milky Way , Spitzer Space Telescope , Gaia Sausage , Mathieu Vrard , Ohio State , பல்கலைக்கழகம் ஆஃப் பர்மிங்காம் , பல்கலைக்கழகம் ஆஃப் போலோக்னா , பால் வழி , ஸ்பிட்சர் இடம் தொலைநோக்கி , கியா தொத்திறைச்சி , ஓஹியோ நிலை ,

The Formation Story of Our Galaxy Just Got Less Violent, But More Interesting


The Formation Story of Our Galaxy Just Got Less Violent, But More Interesting
24 MAY 2021
Ever since the Gaia satellite began mapping the Milky Way in three dimensions with the highest precision yet, we ve been learning a lot about our home galaxy s violent past.
The scrappy cannibal has collided with, and subsumed, multiple other galaxies over its 13.6-billion year lifespan. The largest of these, the Gaia-Enceladus dwarf galaxy (AKA the Gaia Sausage), took place around 10 billion years ago, and was thought to be responsible for a curious feature of the Milky Way s structure called the thick disk.
 
Now, however, it appears that this may not be the case. Astronomers have studied another galaxy with a thick disk, and determined that its evolution wasn t a cataclysmic accident, but just a pretty normal way for spiral galaxies to grow. ....

Milky Way , Magallanesy Antáica Chilena , New South Wales , Nicholas Scott , Centre Of Excellence , University Of Sydney , Gaia Sausage , All Sky Astrophysics , European Southern Observatory , Very Large Telescope , Milky Way Type , Astrophysical Journal , பால் வழி , புதியது தெற்கு வேல்ஸ் , நிக்கோலஸ் ஸ்காட் , மையம் ஆஃப் சிறப்பானது , பல்கலைக்கழகம் ஆஃப் சிட்னி , கியா தொத்திறைச்சி , அனைத்தும் வானம் வானியற்பியல் , ஐரோப்பிய தெற்கு கண்காணிப்பு , மிகவும் பெரியது தொலைநோக்கி , பால் வழி வகை , வானியற்பியல் இதழ் ,

Milky Way's early history calculated by 'listening' to the stars


Milky Way s early history calculated by listening to the stars
Researchers measured oscillations caused by sound waves trapped inside the stars
The Milky Way pictured over Bamburgh Lighthouse at Stag Rock in Northumberland (Image: Owen Humphreys/PA Wire)
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Some of the oldest stars in our galaxy have been dated with unprecedented precision, scientists say. ....

United Kingdom , Josefina Montalban , Andrea Miglio , University Of Birmingham , University Of Bologna , Milky Way , Gaia Sausage , Nature Astronomy , Professor Andrea Miglio , Uk World News , ஒன்றுபட்டது கிஂக்டம் , பல்கலைக்கழகம் ஆஃப் பர்மிங்காம் , பல்கலைக்கழகம் ஆஃப் போலோக்னா , பால் வழி , கியா தொத்திறைச்சி , இயற்கை வானியல் , இங்கிலாந்து உலகம் செய்தி ,