eROSITA relaxes cosmological tension 

The analysis of how galaxy clusters, the largest structures in the Universe, evolve over cosmic time has yielded precise measurements of the total matter content and its clumpiness, report scientists of the German eROSITA consortium, led by the Max Planck Institute for Extraterrestrial Physics. The results affirm the standard cosmological model and alleviate the so-called S8 tension, while at the same time offering insights into the elusive neutrinos' mass and dark energy equation of state. The analysis is based on one of the largest catalogues of galaxy clusters and superclusters, also released today, and showcases eROSITA's immense discovery potential. With several more all-sky surveys being analysed right now, eROSITA promises to refine our cosmological understanding to unprecedented levels.

The X-ray sky opens to the world 

Today, the German eROSITA consortium released the data for its share of the first all-sky survey by the soft X-ray imaging telescope flying aboard the Spectrum-RG (SRG) satellite. With about 900 000 distinct sources, the first eROSITA All-Sky Survey (eRASS1) catalogue has yielded the largest X-ray catalogue ever published. Along with the data, the consortium released today a series of scientific papers describing new results ranging from studies of the habitability of planets to the discovery of the largest cosmic structures. Based on just the first six months of observations, eROSITA has already detected more sources than had previously been known in the 60-year history of X-ray astronomy. Now available to the worldwide science community, the data will revolutionise our knowledge of the Universe at high energies.

Our deepest view of the X-ray sky