The sun

• The sus's structure:

  A) corona

  B) photosphere

  C) sunspot

  D) chromosphere

  E) coronal hole

  F) convection zone

  G) prominence

  H) radiation zone

  I) core

  
• Solar wind: A flow of charged particles emitted by the surface of the Sun.
• Corona: The outermost layer of the sun, which is mostly hydrogen.
• Photosphere is the visible surface of the sun
• Convection Zone: Energy transported upward by rising hot gas.
• Radiation zone: energy transported upward by photons
• Core: energy generated by nuclear fusion.
• Sun's structure from inside out:

  1. core
  2. Radiation zone
  3. Convection zone
  4. photosphere
  5. corona
• Why does the Sun shine?

  Nuclear fusion; the Sun shines because of the nuclear fusion of hydrogen atoms into helium in its core, releasing immense amounts of energy in the form of light and heat.
• How does nuclear fusion occur in the sun?

  Nuclear fusion in the Sun occurs through a series of processes known as the proton-proton chain reaction, where hydrogen nuclei (protons) collide and fuse under extreme temperatures and pressures to form helium, releasing vast amounts of energy in the process.
• How does the energy from fusion get out of the sun?

  • Randomly bouncing photons carry energy through the radiation zone.
  • Rising of hot plasma carries energy through the convection zone to the photosphere.
• Nuclear fission: SPLITS a larger atom into 2 or more smaller ones.
• Nuclear Fusion: JOINS 2 or more lighter atoms in larger one (stars, sun)
• High temperatures enable nuclear fusion to happen in the core.
• • At low speeds, electromagnetic repulsion prevents the collision of nuclei
  • At high speeds, nuclei come close enough for the strong force to bind them together.
• The sun releases energy by fusing 4 hydrogen nuclei into one helium nucleus.
• For every Joule of energy released by fusion, some neutrinos are created