neutrinos

Example:Neutrino astronomy has opened a new window into the workings of the universe, particularly in observing supernovae.

Definition:A branch of astronomy that studies the universe through the detection of neutrinos, particles that can travel virtually unimpeded through the universe, providing information about regions of space that are difficult to observe with traditional telescopes.

Example:Neutrino oscillation is a key piece of evidence for the theory that neutrinos have a small mass.

Definition:The phenomenon where a neutrino can change from one type to another as it travels through space, indicating that neutrinos have a small mass, which was unexpected by the standard model of particle physics.