Belgian physicist Francis Halzen won the 2026 Nobel Prize in Physics for his pioneering work on the IceCube Neutrino Observatory in Antarctica.
Key facts
- •Francis Halzen, 82, is a Belgian-born US citizen and professor at the University of Wisconsin–Madison.
- •The IceCube Neutrino Observatory is the world's largest neutrino detector.
- •Sensors are buried 2,500 meters (8,200 feet) deep to shield against cosmic ray interference.
- •Halzen first proposed the concept of the Antarctic observatory in 1988.
- •The Nobel committee described the prize as honoring work on 'ghostly messengers from space'.
Belgian-born physicist Francis Halzen was awarded the 2026 Nobel Prize in Physics on Tuesday for his contributions to the IceCube Neutrino Observatory. The Royal Swedish Academy of Sciences honored Halzen for his role in using Antarctic ice to detect high-energy neutrinos of astrophysical origin. The observatory, located at the Amundsen-Scott South Pole Station, utilizes a cubic kilometer of ice to capture these rare subatomic particles.
By the numbers
Detecting Ghost Particles
Neutrinos are tiny, electrically neutral particles with extremely small mass that travel through space in straight lines without losing energy. Because they rarely collide with other matter, they are difficult to observe. Halzen, a professor at the University of Wisconsin–Madison, proposed using the vast Antarctic ice as a detector in 1988. The completed observatory, which became operational in 2011, uses light sensors buried approximately 8,200 feet deep to detect flashes of light produced when neutrinos interact with the ice.
Scientific Impact
The Nobel committee stated that Halzen’s work paved the way for a new form of astronomy, allowing researchers to study energy-rich processes in the distant universe. By capturing neutrinos that arrive intact from violent cosmic environments, scientists can gain information about the evolution of the universe that is otherwise unavailable. Michael Moloney, CEO of the American Institute of Physics, described the experiment as a revolutionary method for understanding the cosmos.
Timeline
- 1988Francis Halzen first proposed the idea for the Antarctic neutrino observatory.
- 2011The IceCube Neutrino Observatory was completed.
- TuesdayFrancis Halzen was announced as the winner of the 2026 Nobel Prize in Physics.
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This article was independently rewritten by ManyPress editorial AI from reporting originally published by Euronews Next, ABC News Technology.
