1. Venus: What Went Wrong? Pierre Cieniewicz

2. ?

3. Earth: R = 6378 km M = 6.1*10 24 kg D orb = 150 Mkm Mars: R = 3397 km M = 6.5*10 23 kg D orb = 225 Mkm

5. Earth: R = 6378 km M = 6.1*10 24 kg D orb = 150 Mkm Venus: R = 6057 km M = 5.0*10 24 kg D orb = 108 Mkm

6. Earth vs Venus

7. Rotation East West EarthVenus

8. Hadley Cells Y

9. No Magnetic Field NO convection

10. Magnetic Field

11. No Magnetic Field

12. Earth vs Venus 100x the Atmospheric Pressure Mostly CO 2 Runaway Greenhouse Effect

13. Early Venus High CO 2 and H 2 O levels Possible Liquid Water Low Solar Luminosity

14. What Happened?

16. Greenhouse Effect

17. What Happened?

18. Where did Earth’s CO 2 go?

20. Venus: What Went Wrong? Pierre Cieniewicz