Observatory, founded 2010
IceCube Neutrino Observatory
IceCube turns a cubic kilometer of Antarctic ice into a neutrino telescope. Its principal investigator, Francis Halzen, won the 2026 Nobel in Physics.
- Location
- Amundsen-Scott South Pole Station, Antarctica
- Focus
- Black holes, Galaxies, Stars, Dark matter, Telescopes and missions
- Coordinates
- -89.990, -63.453
The IceCube Neutrino Observatory, at the Amundsen-Scott South Pole Station, is a cubic kilometer of Antarctic ice instrumented with light sensors. When a neutrino hits an atomic nucleus in the ice, it produces a flash that the sensors track. Because neutrinos travel without changing direction or losing energy, they point straight back to their sources, even through matter that blocks light. IceCube was completed in December 2010 and is led by the University of Wisconsin-Madison.
Flagship instruments
- 86 strings carrying 5,160 Digital Optical Modules, frozen into the ice between 1,450 and 2,450 meters deep.
- IceCube Upgrade: five new, densely instrumented strings with more than 600 new and enhanced sensors, reported as successfully deployed in February 2026, the first major expansion since 2010.
Recent results
In 2013 IceCube reported 28 high-energy neutrinos that likely came from beyond the Solar System, including two at peta-electronvolt energies. In 2018 it traced a neutrino to the blazar TXS 0506+056, and in 2023 it mapped neutrino emission from the plane of the Milky Way. In June 2026, astronomers proposed a lensed, dusty galaxy 11 billion light-years away, nicknamed “Shadow Blaster,” as the source of an IceCube neutrino. On October 6, 2026, the Nobel Prize in Physics went to principal investigator Francis Halzen for decisive contributions to IceCube and the discovery of high-energy astrophysical neutrinos. Halzen first presented his idea of detecting neutrinos in South Pole ice in 1988.
What to watch, 2026-2030
- 2026 onward: science with the IceCube Upgrade.
- IceCube-Gen2, a proposed larger expansion, is not yet approved.
Why scientists are converging here
A Nobel Prize puts a field on the map, and multi-messenger astronomy, combining light, neutrinos and gravitational waves, is where many black hole and cosmic-accelerator questions now get answered. In our Research Pulse count, “neutrino” appeared in 528 astro-ph abstracts from April to September 2026, up 15% on the previous six months. Gamma-ray astronomy is scaling up in parallel at CTAO.
