Great discoveries are on the way, some of which will challenge our knowledge.

If we’re all interested in space science, let’s wait. First images from the James-Webb space observatory — To be made public on July 12 — astronomers Excited and puzzled today for the release of the Gaia mission’s third data catalogue. Unlike other quests that target specific objects, Gaia is a “simple” research quest. So don’t expect to see beautiful pictures of the Universe.

If astronomers around the world are looking forward to this data, it’s because Gaia’s performance is unmatched. Indeed, this satellite can observe all objects that are 400,000 times fainter than the faintest in the world. stars observableeyelash naked. As a result, this catalog of new and improved details for nearly two billion stars in our galaxy is the gold standard in astronomy. It lists approximately 1.8 billion celestial bodies with unprecedented astrometric and photometric precision and represents a major advance over the previous catalog (DR2) in terms of precision, accuracy and homogeneity of astrometric and photometric data.

Great potential for knowledge

Why “simple” measurements excite astronomers and astrophysicistsIt should be known that Gaia can measure its position and motion in three dimensions, its color and properties for every star it can detect in the galaxy. physically and even chemicals for the brightest. This is not a new, slightly improved definition of the galaxy, but more than a significant enrichment of information.

Gaia’s data will be useful to all fields of astronomy and science.astrophysics. There is no single astronomer. historianchemist or physicistwill not directly or indirectly use its data. So we expect new discoveries, a significant advance in our understanding of the Universe, and more surprisingly, a certain amount of knowledge being questioned.

There is not a single astronomer, whether historian, chemist or physicist, who would not use his data directly or indirectly.

New to this dataset is the largest star catalog to date. binariesfrom thousands of objects solar system like asteroids and moons of planets Milky Waymillions of galaxies and quasars.

Launched in December 2013 to 3D map over a billion objects in our galaxy with unmatched precision, Gaia should be up and running by 2025. It took five years to deliver this third catalog of observations, spanning 2014 to 2017. 2030 to get the latest version of the Gaia catalog.

surprising discoveries

Various findings have been presented today. Thus, we learn that some of the stars in our galaxy are composed of the following. To be important others like us Sunis made of previous generation star-enriched material. Stars closer to the center and plane of our galaxy are richer. metals more distant than stars

Gaia also identified stars from galaxies other than our own, based on their chemical composition. This diversity It is extremely important because it tells us the story of the formation of our galaxy. Uncovers migration processes inside our galaxy andagglomeration from outer galaxies. It also clearly shows that our Sun and all of us belong to an ever-changing system formed by the merging of stars. gas from different origins Says Alejandra Recio-Blanco of the Côte d’Azur Observatory in France, a member of the Gaia collaboration.

More surprisingly, Gaia Detecting stellar earthquakes that appear as tiny movements on a star’s surface and change the shape of stars Conny Aerts from KU Leuven in Belgium, a member of the Gaia collaboration. Finally, it features a new binary star catalogue. orbits more than 800,000 of them binary systemsA new study of 156,000 asteroids delves deeper into the origins of our solar system. Gaia also provides information about 10 millionvariable starsmysterious macromolecules between quasars and galaxies as well as stars beyond our own cosmic neighbour.

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