Gaia's Massive Third Data Release is out! universetoday storybywill
The latest release also includes data on special subsets of stars, like those that undergo changes in brightness over time . The DR3 also contained the largest catalog of binary star systems, thousands of Solar System objects , and millions of galaxies and quasars outside the Solar System . Other major discoveries include the ability ofto detect tiny motions on the surface of a star and improved data on the chemical compositions of stars.
The key aspect of stellar composition is the amount of heavy metals they contain, also known as “metallicity.” The first stars in the Universe, which formed roughly 100 million years after the Big Bang, were composed of hydrogen and helium, reflecting the composition of the Universe at the time.
When these stars collapsed at the end of their life cycles and exploded in massive supernovae, these elements were dispersed through the interstellar medium – from which new stars formed. This active cycle of star formation and death slowly enriched the interstellar medium with metals over time. Subsequent generations of stars, known as Population II and I, contained greater and greater amounts of these elements, which can be used to determine their age.
This final product will contain the most precise astronomical measurements ever made and will include:All available variable-star and non-single-star solutions Source classifications plus multiple astrophysical parameters for stars, unresolved binaries, galaxies, and quasars. Some parameters may not be available for faint starsAll of this information will be made available for free to researchers and the general public through the ESA’s
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