Neutrinos

a) What is a neutrino?
An electrically neutral elementary particle that is one of the products of nuclear fusion reactions. Neutrinos have little or no mass, move at close to the speed of light, and interact very weakly with matter.

b) Why are neutrinos so important to understanding the sun?
Neutrinos can go through unimaginable amounts of material without being affected. There is less than a percent chance that anything would ever happen to them as they passed through the sun, certainly through the Earth. We can calculate for the neutrinos of all types that start in the interior of the sun, and we want to know what the total number of neutrinos reaching the Earth. Neutrinos also show the nuclear fusion from the sun.

c) Would you be able to persist for as long as Bahcall and Davis did when people doubted your experiment?
No, I don't think I could have been as persist for as long as Bahcall and Davis. For three decades people had been pointing at this guy and saying this is the guy who wrongly calculated the flux of neutrinos from the sun.

d) What is the importance of neutrinos having mass?
Billions of neutrinos pass through Earth each second, but since they are particles with no electric charge and have very little mass, they only interact weakly with other kinds of matter and are difficult to detect.

e) Where are neutrinos being studied today?
South Dakota, Canada, Japan