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Luna

Luna. Journey to the Moon. Characteristics. 384,000 Km away from earth Diameter of 3,476 Km Density is 1/80 th of Earth Temperature range: 130°C to -180°C No atmosphere No liquid water, Ice at Poles. Moon’s Surface 3 major Features. Maria: Dark flat areas due to lava flows

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Luna

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  1. Luna Journey to the Moon

  2. Characteristics • 384,000 Km away from earth • Diameter of 3,476 Km • Density is 1/80th of Earth • Temperature range: 130°C to -180°C • No atmosphere • No liquid water, Ice at Poles

  3. Moon’s Surface3 major Features • Maria: Dark flat areas due to lava flows • Latin for seas. Galileo thought there were oceans • Craters: Large round pits • Caused by impact of meteoroids • Chunks of rock or dust • Highlands: Light-colored features that are mountains

  4. Origin of the Moon • Planet sized object crashed into earth • Mantle material and outer layer ejected into space • Forms a ring around Earth • Gravity formed into Moon

  5. Traveling into Space • Rocket: a device that expels gas in one direction to move the rocket in the other direction • A rocket moves forward when gases shooting out the back of the rocket push it in the opposite direction • 2 Forces: • Action and Reaction

  6. Action and Reaction • Law of Physics: For every force, or action, there is an equal and opposite force, or reaction. • Thrust: Reaction force that propels a rocket forward • Depends upon mass and speed of gases • Greater the thrust the greater the velocity • Action Force: Rocket pushes gases out • Reaction Force: Gases push rocket forward

  7. Orbital and EscapeVelocity • Escape Velocity: Velocity a rocket must reach to fly beyond a planet’s gravitational pull • Orbital Velocity: The velocity a rocket must achieve to establish an orbit around Earth.

  8. Multistage Rocket

  9. What is the advantage of a multistage rocket?

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