Researchers from the University of Bologna and the Leibniz Institute for Astrophysics Potsdam (AIP) and other Institutes have proposed a new way to address the “Hubble tension” by comparing estimates of the Universe’s age rather than its expansion rate. Using precise stellar data, they determined ages for carefully selected very old Milky Way stars and found a most likely age of about 13.6 billion years.

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An international research team has used data from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) to create the largest and most accurate three-dimensional map to date of what is known as Lyman alpha light—the light emitted by ionized hydrogen in the early universe between 9 and 11 billion years ago.

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As part of the Girls' Day / Future Day Brandenburg on April 23, 2026, twenty female students can gain exciting insights into the fascinating world of astronomy and the work at an astrophysical research institute.

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Cosmic events are determined by two natural forces: gravity and magnetic fields. The magnetic field research at the AIP is mainly focused on magnetohydrodynamic (MHD) simulations, the magnetically induced activities on the Sun and the stars, solar coronaphysics as well as space weather in our solar system and on planets around other stars.

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Galaxies are fundamental cosmic building blocks. At the largest scales, they serve as markers to study the distribution of matter in the universe - active galaxies and quasars are particularly important because of their intrinsic brightness. Nearby objects can be spatially resolved and consist of populations with very different patterns of motion, star formation histories and chemical abundances.

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