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Seeing the Invisible: Observing the Dark Side of the Universe

Seeing the Invisible: Observing the Dark Side of the Universe. Sarah Bridle University College London. What we see. What we don ’ t see. What we don ’ t see. Missing matter: Dark Matter (matter that doesn ’ t shine). What we don ’ t see. Missing energy: Dark Energy

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Seeing the Invisible: Observing the Dark Side of the Universe

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  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. What we don’t see 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)

  6. Supernovae as Standard Candles

  7. Big Bang 5 billion years ago Today

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

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

  10. Using the bending of light to see the invisible

  11. Just one Equation from General Relativity

  12. 90 years ago Eddington confirmed Einstein’s prediction during a solar eclipse

  13. Average galaxies together to measure weak gravitational shear

  14. Simulated Dark Matter Map

  15. Gravitational Lensing Map

  16. Universe was 0.2 Gyr old

  17. Universe was 1 Gyr old

  18. Universe was 4.7 Gyrs old

  19. Today (13.6 Gyr)

  20. Map in 3d

  21. Map in 3d

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

  23. Gravitational Lensing

  24. Atmosphere and Telescope

  25. Pixelisation

  26. Noise

  27. www.great08challenge.info

  28. Results from the HST COSMOS Survey

  29. The Largest ever Survey with HST

  30. The Invisible The Visible

  31. In 3 Dimensions

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