Space physics p16

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  • Created by: Sc1602
  • Created on: 17-03-18 21:11
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  • Space Physics
    • Our solar system
      • Star
        • The sun
          • Formed by nebulla
            • Cloud of  dust and gas
            • Pulled together by gravitational attraction
      • Eight planets
      • dwarf planets
        • Orbit the sun
      • Part of Milky Way galaxy
      • Natural satellites
        • Moons that orbit planets
    • Life cycle of a star
      • Start
        • Dust and  gas gathered by gravitational attraction
          • Cause fusion reactions
            • Lead to an equilibrium between gravitational collapse and expansion
              • Due to fusion energy
      • determined by size
      • Same size as sun
        • Nebulla
          • Protostar
            • Main sequence star
              • red giant
                • White dwarf
                  • Black dwarf
      • Much bigger than the sun
        • Nebulla
          • Protostar
            • Mean sequence star
              • Red super giant
                • Supernova
                  • Neutron star
                  • Black hole
    • Elements
      • Fusion in stars
        • Produces all naturally occurring elements
        • elements heavier than iron
          • Produced in a supernova
      • Explosion of a supernova
        • distributes  elements through the universe
    • Orbital motion
      • Gravity
        • Provides force that allows planets and satellites to maintain circular orbits
      • In circular orbits
        • grabity can lead to changed velocity but unchanged speed
      • In stable orbits
        • Radius  must change if speed changes

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