1. Seeing Hubble’s Universe Making Pictures from Data Zolt Levay Space Telescope Science Institute Office of Public Outreach Zolt Levay Space Telescope Science Institute Office of Public Outreach

2. 2 From This…

3. 3 …To This

4. Pictures from Data ✦ Byproduct of science data. ✦ Combine exposures, scale data. ✦ Reconstruct color. ✦ Photography techniques make features in the data visible. 4

5. Opportunities | Challenges ✦ Available data ✦ Brightness range ✦ Spatial coverage ✦ Spectral coverage ✦ Cosmetics 5

6. 6 Cosmic Rays

7. 7

8. 8 Cosmic Rays Removed

9. Enhance Brightness & Contrast 9

10. 10

11. Enhance Brightness & Contrast 11

12. Enhance Brightness & Contrast 12

13. Spatial Dimension 13

14. Exposures 14

15. Mosaic 15

16. Luminosity Dimension 16

17. Color Dimension IVB 17

18. RedGreenBlue “Natural” Color Composite 18

19. RedGreenBlue “Natural” Color Composite 19

20. [N II] Red HH [O III] Cyan Alternate Color Assignment 20

21. [N II] Red HH [O III] Cyan Alternate Color Assignment 21

22. [N II] Red HH [O III] Cyan Alternate Color Assignment 22

23. Alternate Color Assignment [N II] Red HH Green [O III] Blue 23

24. Alternate Color Assignment [N II] Red HH Green [O III] Blue 24

25. ✦ Instrument artifacts ✦ Uneven background ✦ Noise ✦ Sharpening Cosmetic Retouching 25

26. ✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 26

27. ✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 27

28. ✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 28

29. ✦ CCD charge bleed ✦ Clone stamp, healing brush ✦ Copy and rotate ✦ Mask Instrument Artifacts 29

30. Uneven Background 30

31. Uneven Background 31

32. Uneven Background 32

33. Useful Art/Photography Principles ✦ Color, form, texture. ✦ Composition, perspective. ✦ Lighting, tonality. 33

34. Composition 34

35. 35 Crop area

36. 36 Cropped

37. Pictures from Data ✦ Byproduct of science data. ✦ Photography techniques make features in the data visible. ✦ Subjective choices informed by art principles make science images visually more appealing. ✦ Nature photography. 37