Gaia probe reveals stellar DNA and unexpected ‘Starquake’

Astronomers have published the most detailed investigation of the Milky Way, revealing thousands of “starquakes” and stellar DNA. Helps identify the most habitable corners of our galaxy. From the report: Observations from the European Space Agency’s Gaia probe cover nearly 2 billion stars (about 1% of the total number of galaxies), and astronomers have reconstructed the structure of our galaxy and how it has evolved over billions of years. You can find out if you did. Prior Gaia’s SurveyLaunched in 2013, a robotic spacecraft has pinpointed the movement of stars in our galaxy in great detail. Rewinding these movements allows astronomers to model how our galaxy has changed over time. Newer observations add details about a star’s chemical composition, temperature, color, mass, and age, based on spectroscopy, in which the star’s light is split into different wavelengths.

These measurements have unexpectedly revealed thousands of starquakes, or tsunami-like events on the star’s surface. “Starquake teaches us a lot about stars, especially the inner workings of them,” said Conny Aerts of KU Leuven, Belgium, a member of the Gaia collaboration. “Gaia is opening up a gold mine for the asteroseismology of massive stars.” Dr. George Seabroke, senior research fellow at the Mullard Institute for Space Sciences at University College London, said: “If you can see these stars change brightness in the middle of the Milky Way, if they are nearby It will be like the sun changing its shape.” In front of your eyes.” Gaia is equipped with a billion-pixel camera (the largest camera in space history) with more than 100 electronic detectors. The latest data set contains 6 million stars, ten times the number measured in previous ground-based catalogs. It represents the largest chemical map of the galaxy to date, cataloging its composition.

Gaia probe reveals stellar DNA and unexpected ‘Starquake’

Source link Gaia probe reveals stellar DNA and unexpected ‘Starquake’

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