While the German census has only just started, the first evaluation of the current census of our Hungarian neighborhood has now been completed, also with the participation of researchers from the TU Dresden. The data obtained for this purpose as part of the European Space Agency’s Gaia mission will be officially released to the public on June 13, 2022 at 12:00 CEST. Press release from the TU Dresden.

ESA ‘s “Data Version 3” The Gaia mission includes a total of 1.8 billion stars in the Milky Way, giving astronomers unprecedented insight into the properties and life cycles of stars, as well as the structure and evolution of the galaxy. (rate: ESA )

June 10, 2022 – Since mid-2014, Gaia has been observing the sky 1.5 million km from Earth and accurately recorded the locations of all celestial bodies visible to the satellite. Since each object is observed many times, the velocities and distances of celestial bodies can also be derived from these measurements. An international team of scientists, including the Lohrmann Observatory at TU Dresden, are processing the data obtained to create the most accurate and complete map of our Milky Way Galaxy. Although the locations and velocities of about 1.8 billion celestial bodies were already published as of December 2020, the now published dataset expands this information considerably.

As with the census, Gaia collects many other data besides location, which is now the current catalog content (DR3). Selected highlights from the wealth of data rich in superlatives: In addition to the largest collection of astrophysical data ever for stars in the Milky Way, the catalog contains the largest number of spectra and radial velocities of stars ever recorded. For example, while the data on binary stars they contain exceeds any work in the field over the past 200 years, the millions of data on the brightness, shape and redshift of galaxies in the local universe now published are unique to global astronomy. society on this scale.

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The team from Dresden led by Professor Serge Kleuner of the TUD was responsible for creating the quasar catalog with nearly two million entries. These quasars, the luminescent cores of very distant galaxies, form the basis of the new celestial reference system, which was officially recognized by the International Astronomical Union in August 2021 and will now be used by all astronomers to describe locations in the sky. As part of the national event, Professor Kleuner in Heidelberg will report on this work and the contribution of Dresden scientists to other parts of the catalog. The event can be followed live online on June 13, 2022 from 11:00 a.m.

For an interested public, the staff of the Lohrmann Observatory will give a lecture at the TU Dresden on Friday, July 1, 2022 at 5 pm as part of this data publication. In it, the team presents information about the challenge of data processing, the fascinating science of using Gaia and plans for the future. The lecture will take place in room E023 of the Faculty of Computer Science (Andreas-Pfitzmann-Bau, Nöthnitzer Str.46, 01187 Dresden).