Gaia: the ESA mission spreads the word about the Milky Way

Today, astronomers have the answer to the evolution of Milky Way in billions of years. And they also know how it will evolve in the future. Scientists have succeeded thanks to the new data about the galaxy sent by the mission Gaia fromHex The goal of the Gaia mission is to create a truly complete multidimensional map of the galaxy. It predicts the position, direction of motion, temperature, speed and composition of nearly two billion objects in the galaxy. The latter may contain 400 billion.

One of the many novelties of the Gaia Data Release 3 catalog is linked to the brand new data collected. The news is that there are so many spectrum, or the analysis of the light emitted by objects. Spectra can be used to accurately obtain temperatures, masses, chemical compositions and luminosity.

The catalog also includes the radial speed It is the speed at which objects move away from or approach the Earth. The radial velocity is 33 million stars, five times greater than the second Gaia catalog.

It was revealed from the new reported data that Gaia can record stellar earthquakes They are small movements on the surface of a star that change shape. Furthermore, Gaia has already reported the presence of radial oscillations. The latter cause the stars to expand and collapse cyclically without changing their spherical shape. Although other non-radial oscillations have also been discovered that change the shape of the star as a whole.

They are hard to detect, but Gaia made it. It has even detected intense movements in thousands of stars, called stellar earthquakes. Remember that the material from the stars can trace the history of the Milky Way. In astronomy, metals are generated in the stars. When a star dies, its scattering composition becomes the star’s DNA.