1. What we know… o10 26 m universe o10 24 m cluster of galaxies o10 22 m milky way o10 14 m solar system/star o10 7 m earth o10 0 m human beings o10 -2 m insects o10 -5 m cells o10 -8 m DNA o10 -10 m atom o10 -14 m nucleus o10 -15 m nucleons o10 -16 m quarks/gluons

2. 10 26 m: the universe The dots are the brightest galaxies

3. 10 24 m: cluster of galaxies ~200.000.000 light years away

4. 10 22 m: our milky way Our milky way is a spiral galaxy

5. 10 14 m: The solar system/star The orbits of the nearby planets

6. 10 8 m: earth

7. 10 0 m: humans Marie Curie

8. 10 -2 m insects

9. 10 -5 m: a lymphocyte (cell for immune system) Scale of cellular biology

10. 10 -8 m: DNA A double helix structure

11. 10 -10 m: atom Field Emission Scanning Microscope image of Platinum surface

12. 10 -14 m: The nucleus 12 C (6 protons and 6 neutrons)

13. 10 -15 m: nucleons & the particle zoo cosmic rays

14. 10 -16 m: quarks and gluons The smallest known building blocks flavorUpDownStrangeCharmBottomTop charge+2/3-1/3 +2/3-1/3+2/3 mass (GeV) 0.0050.010.151.55.0180

15. nuclear physics

16. particle physics

17. long island quark-gluon physics