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QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact astronomers' view of the galaxy? It prevents them from seeing most of the visible and ultraviolet light from the galactic disk. It produces so much visible light that it blocks our view of anything beyond it. It absorbs all wavelengths of light. It has no effect on visible-light observations, but prevents us from studying the galactic center with radio waves or X-rays. QUESTION 12 How does the mechanism which powers the Sun's energy compare with that of nuclear power plants? The Sun generates energy by fusing small nuclei into larger ones, while our power plants generate energy by the fission (splitting) of large nuclei. The Sun generates energy through fission while nuclear power plants generate energy through fusion. The Sun generates energy through nuclear reactions while nuclear power plants generate energy through chemical reactions. Both processes involve nuclear fusion, but the Sun fuses hydrogen while nuclear power plants fuse uranium.

Answer 1

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