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The Universe
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The Universe

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Transcript

  • 1. The Big Bang Theory and Solar Nebula The Universe
  • 2. Where do we live?
  • 3. Where are we located?
  • 4.
    • We live on the Earth
    • The Earth is a planet in the Solar System, orbiting our star which we call the Sun
    • The Sun is part of a galaxy
    • When we look out into the sky at night, all of the stars we see are in our galaxy
    • But our galaxy is just one of many…..
  • 5. The Solar System
  • 6. Question?? What is a STAR?
  • 7.  
  • 8. What is a Star?
    • A star is a big ball of burning gas
    • When we look out into the night sky, many of the stars we see are very similar to our own sun
    • In fact some of these stars also have planets, just like our own Solar System
  • 9. What is this? What is it made of?
  • 10.  
  • 11. MANY STARS
  • 12. MANY STARS SOME SUN-LIKE
  • 13. Galaxies
    • Stars tend to group together to form galaxies
    • Galaxies contain hundreds of thousands of stars
    • At the centre of most galaxies is a massive black hole!
    • Our sun is part of a galaxy
  • 14. You are here!
  • 15. Our Galaxy from the Earth
  • 16. Galaxies as seen with the Hubble Space Telescope
  • 17. The Big Bang Theory
    • How did everything start?
    • How long ago did this happen?
  • 18. In the Beginning
  • 19. All the mass and energy of the universe
  • 20. EVERYTHING!
  • 21. EVERYTHING! ENERGY INCREASING, BECOMING LIKE A BOMB……. STARTS EXPANDING…..
  • 22. BOOM!
  • 23. The Big Bang
    • Not really an ‘explosion’
    • Universe expanded rapidly as a whole
    • (Universe is still expanding today as a result of the Big Bang)
    • Matter was created in the form of tiny particles (protons, neutrons, electrons)
    • Too hot for normal ‘stuff’ to form (eg atoms, molecules)
  • 24.  
  • 25. COSMIC ‘SOUP’
  • 26. PROTON NEUTRON ELECTRON COSMIC ‘SOUP’
  • 27.
    • Universe much cooler, atoms start to form…..
    • Hydrogen, Helium, normal ‘stuff’
    300,000 Years Later…..
  • 28.  
  • 29. Universe is now a GAS
  • 30. Universe is now a GAS HYDROGEN HELIUM
  • 31.  
  • 32. GRAVITY!
  • 33. Gravitational Collapse
    • We started with a uniform gas
    • Small regions became more dense
    • The denser regions had larger gravity and started to pull other particles towards them
    • The gaseous Universe began to look ‘clumpy’
  • 34. Gravitational Collapse
    • Regions with more particles (higher density) become gas clouds
    • Gas clouds become stars and galaxies
    • Galaxies congregate together in filaments , groups and clusters
  • 35. If we could view the Universe from outside, if would look like this:
  • 36. But we are inside one of these galaxies, so all we see are the nearby stars. We can see other galaxies if we use a telescope
  • 37. The Gemini Telescope
  • 38.  
  • 39.  
  • 40. Future?
    • The Universe is still expanding
    • All galaxies are moving apart
    • The ‘explosion’ of the big bang is still happening!
    • It may contine expanding forever
    • Or is may stop expanding, and fall inwards in a big CRUNCH!
  • 41. What have we learned?
    • The Universe started with a BIG BANG
    • Gradually the particles were drawn together under GRAVITY to form STARS and GALAXIES
    • Many stars have planets around them
    • The fate of the Universe is uncertain…
  • 42. THE END

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