1. P2h The Big Bang

2. Our Universe What it is like, how it started, how it evolved to its current state, and how it will end Today we will talk about:

3. First, let’s look at some of the objects we might find if we explored our Universe

4. Where do we live?

5. Where is the Earth?

6. The Solar System

7. Q: What is a STAR?

9. Our Sun is a star!

10. What is this?

11. What is it made of?

13. MANY STARS

14. SOME SUN-LIKE

15. You are here!

17. Our Galaxy from the Earth

18. Galaxies: Hubble Space telescope image

19. ‘Zoom out’ - galaxies form filaments and voids

20. IN THE BEGINNING…….

21. EVERYTHING!

23. ENERGY INCREASING, BECOMING LIKE A BOMB……. STARTS EXPANDING…..

24. Tick tick tick……

25. BOOM!

27. COSMIC ‘SOUP’

28. PROTON NEUTRON ELECTRON COSMIC ‘SOUP’

29. Universe much cooler, atoms start to form….. Hydrogen, Helium, normal ‘stuff’ 300,000 Years Later…..

31. Universe is now a GAS

32. HYDROGEN HELIUM

34. GRAVITY!

35. Gravitational Collapse

37. If we could view the Universe from outside, if would look like this:

38. 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

39. The Gemini Telescope

42. What have we learnt? 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…

43. Big Bang - Tasks Discuss & do in Pairs Design a time-line of events since the Big Bang What evidence is there to support the Big Bang theory? 1.Decide on 2 non-fact-based questions to ask the rest of the class on this topic

45. Research and Discussion Points

46. What was there before the Big Bang? What caused the Big Bang? How big is the Universe? Will the Universe keep expanding?

47. THE END?