|Artist’s impression based on real picture of Icecube lab. IceCube/NSF|
This is the first time a source of neutrinos in space has been discovered in more than 30 years. What’s more, it’s the first time scientists have observed a neutrino particle with high energy associated with an astrophysical event. This is really exciting news. The observation, just published in Science, opens a completely new chapter in neutrino astronomy.
|Amble/wikipedia, CC BY-SA|
This trail is captured by a large array of sensitive photodetectors that are mounted up to three kilometres deep into the ice. With this information, IceCube can detect high energy neutrinos, measure their energy and determine where they came from. Other cosmic particles only travel a few kilometres through the Earth, at most. So, if the particle is seen to come up from below, it must have been produced by a neutrino interaction, as it is the only particle that can travel such a large distance through the planet.