eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is a space telescope designed for X-ray astronomy, which was launched in July 2019 as part of the Russian-German “Spectrum-Roentgen-Gamma” (SRG) mission. Its primary goal is to perform a detailed all-sky survey in the X-ray band, mapping the large-scale structure of the universe and helping to explore the mysterious phenomena of dark energy and dark matter. eROSITA aims to detect over 100,000 galaxy clusters, millions of active galactic nuclei, and many types of stars with strong, hot coronas, significantly exceeding the scope of previous missions in this field. This extensive survey is expected to provide valuable insights into the structure, evolution, and physics of the universe.