The IceCube neutrino observatory at the geographic South Pole has now been operating at full capacity for ten years. Following the first observation of astrophysical neutrinos in the TeV — PeV energy range in 2013, cosmic neutrinos have been established as an important information carrier for exploring the high-energy universe in the context of multi-messenger observations. However, despite a first compelling evidence, the sources of high-energy neutrinos remain largely hidden, indicating a complex neutrino sky.
After an introduction to neutrino astronomy as well as the operation principle of neutrino telescopes and the challenges of building a neutrino detector at the South Pole, the talk will highlight recent results from IceCube. Finally, an outlook on future enhancements of IceCube is given, which aim at addressing the open questions.