Neutrin1 - produced about a million years ago, they tell us...

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Neutrino Helium is produced in the fusion of hydrogen. As shown in the proton-proton fusion chain diagram above, there are two other particles produced. One is the "positron" and the other is a "neutrino". A positron is the antimatter counterpart of the electron. It has the same mass as an electron but the opposite charge. When it collides with an electron, they annihilate each other converting all of their mass into energy. The photons produced in nuclear reactions take about a million years to move from the core to the surface. The photons scatter off the dense gas particles in the interior and move about a centimeter between collisions. In each collision they transfer some of their energy to the gas particles. By the time photons reach the photosphere, the gamma rays have become photons of much lower energy---visible light photons. Because the photons now reaching the surface were
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Unformatted text preview: produced about a million years ago, they tell us about the conditions in the core as it was a million years ago. The other particle produced in nuclear reactions has a less tortuous path out of the core. A neutrino is a massless (or very nearly massless) particle that rarely interacts with ordinary matter. Neutrinos travel extremely fast---the speed of light if they have zero mass or very close to the speed of light if they have a small mass. Because they travel so fast and interact so rarely with matter, neutrinos pass from the core of the Sun to the surface in only two seconds. They take less than 8.5 minutes to travel the distance from the Sun to the Earth. If you could detect them, the neutrinos would tell you about the conditions in the Sun's core as it was only 8.5 minutes ago (much more current information than the photons!)....
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Neutrin1 - produced about a million years ago, they tell us...

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