Applications
When astronomical bodies, such as the Sun, are studied using light, only the surface of the object can be directly observed. Any light produced in the core of a star will interact with gas particles in the outer layers of the star, making it impossible to observe the core directly. Neutrinos, however, very rarely interact with other particles. Neutrinos which are created in the cores of stars (as a result of stellar fusion) can be observed using neutrino astronomy.
Read more about this topic: Neutrino Astronomy