As a result, the detector had become hightly sensitive and had succeeded in detecting neutrinos from a supernova explosion which occured in the Large Magellanic Cloud in Febrary 1987. Solar neutrinos were observed in 1988 adding to the advancements in neutrino astronomy and neutrino astrophysics. Pur pose of Research Study of Cosmic Neutrino Kamioka Underground Observatory had been researching neutrinos from supernova explosions and solar neutrinos. Research of Neutrinos enable us to probe stellar core which is inaccessible with optical or radio observations and all other regions of the electromagnetic spectrum. Observations of cosmic neutrinos would help determine the intrinsic properties of this elusive particle, neutrino itself.
Neutrino observations are of great importance to both astronomy and paricle physics.
Verification of the Grand Unified Theories Experimental verification of the Grand Unified Theories is another purpose of this experiment at Kamioka. The energy of the charged particle that emits Cherenkov light is determined by the light intensity. The shape of the light pattern and the arrival time of the light give the direction and position of the particle. The Kamiokande detector employs a large water tank surrounded by photomultiplier tubes on the walls of the detector. The detector is located deep underground to avoid contamination of proton decay and neutrino events by other abundant ground level cosmic-ray events.