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Space Explorations

Space Explorations. Why should humans explore the space? Is it possible for humans to explore places beyond the solar system? Will we ever reach other stars? What are the obstacles that we should overcome before we can make explorations to far places like other galaxies?.

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Space Explorations

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  1. Space Explorations

  2. Why should humans explore the space? • Is it possible for humans to explore places beyond the solar system? • Will we ever reach other stars? • What are the obstacles that we should overcome before we can make explorations to far places like other galaxies?

  3. Voyage to Proxima Centauri • Proxima Centauri, the closest star to us aside from the sun is 4.2 light years away. • It means that even if you travel at the speed of light, it will still take you approximately 8 years and 5 months to make a round trip journey to this neighboring star

  4. First Step Into Space • Space Voyages are made possible by the combined use of rocket, radios and computers

  5. Rockets • Are self-propelled devices that carry their own fuel, as well as the oxygen, or other chemical agent, needed to burn fuel. • Fire Arrow, rockets by the Chinese were used as weapons as early as 1232. A fast-burning mixture similar to gunpowder was used as fuel.

  6. How Can Rockets Fly? • Rockets are based on Isaac Newtons Third Law of Motion (also called the law of action-reaction) • This law states that “for every action there is always an opposite and equal reaction”

  7. How Can Rockets Fly? • The fuel container and burning chamber of a rocket is a tube that has nozzle at one end.

  8. How Can Rockets Fly? • When the fuel burns, the expanding gases exert an action force on every inner part of the tube.

  9. How Can Rockets Fly? • The tube pushes back with a force on all surfaces except the nozzle where the hot gases escape.

  10. How Can Rockets Fly? • A thrust force builds up at the end of the nozzle.

  11. How Can Rockets Fly? • Thrust is the force that propels the rocket forward.

  12. How Can rockets Fly? • On Earth’s surface, a large amount of force is needed to overcome gravity and friction

  13. How Can Rockets Fly? • In space, less thrust is needed to move a rocket forward.

  14. The Space Age • Began in 1967 when USSR used a rocket to launch Sputnik I into Earth’s orbit

  15. The Space Age • Signals from two radio transmitters on Sputnik I were heard around the world.

  16. The Space Age • Sputnik I was an artificial satellite

  17. What is a Satellite? • It is an object that revolves around a larger body • We have natural satellites such as the moons • We have the artificial satellites like the Sputnik I

  18. Artificial Satellite • Are used for communications and for monitoring weather.

  19. Echo • The first reflector communications satellite

  20. Echo • On its surface it had a thin aluminum coating that acted like a mirror to reflect light and radio waves

  21. Echo • Was used to relay telegrams, telephone calls and pictures across continents and oceans. • Television images were also relayed by this satellite.

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