1. Seeing the Invisible: Observing the Dark Side of the Universe Sarah Bridle University College London

2. What we see

3. What we don’t see

4. Missing matter: Dark Matter (matter that doesn’t shine)

5. What we don’t see Missing energy: Dark Energy (energy that is not matter) Missing matter: Dark Matter (matter that doesn’t shine)

7. Supernovae as Standard Candles

9. Big Bang5 billion years agoToday

10. Why is the Universe Accelerating? Einstein’s cosmological constant A new fluid called Dark Energy General Relativity is wrong

12. Seeing the Invisible: Is there something in between us and the wall and tree?

13. Using the bending of light to see the invisible

14. Just one Equation from General Relativity

16. 90 years ago Eddington confirmed Einstein’s prediction during a solar eclipse

28. Average galaxies together to measure weak gravitational shear

29. Simulated Dark Matter Map

30. Gravitational Lensing Map

33. Universe was 0.2 Gyr old

34. Universe was 1 Gyr old

35. Universe was 4.7 Gyrs old

36. Today (13.6 Gyr)

37. Map in 3d

39. Typical star used for finding telescope response Typical galaxy used for lensing

40. Gravitational Lensing

41. Atmosphere and Telescope

42. Pixelisation

43. Noise

44. www.great08challenge.info

45. Results from the HST COSMOS Survey

46. The Largest ever Survey with HST

48. The Visible The Invisible

49. In 3 Dimensions

52. The Future JDEM

53. Future prospects Cosmic microwave background radiation – Distribution of dark matter at early times Distribution of galaxies – Some clues to distribution of matter Galaxy velocities – Galaxies fall towards dark matter clumps Gravitational lensing The Dark Energy Survey

54. Hexapod Corrector Lenses CCD Readout Filters Shutter Mechanical Interface of DECam Project to the Blanco Focal plane (detector)

56. Ground vs Space weak lensing shear space ground

59. HST COSMOS

61. Why is the Universe Accelerating? Einstein’s cosmological constant A new fluid called Dark Energy General Relativity is wrong