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Mars: Earth’s little brother

Mars: Earth’s little brother. What are the similarities and differences you notice?. Mars’s axis is tilted at 25 deg. What are seasons on Mars like?. Mars’s axis tilt changes dramatically. What happens when the tilt is less/more?. Artist’s depiction of an ‘icy Mars’.

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Mars: Earth’s little brother

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  1. Mars: Earth’s little brother

  2. What are the similarities and differences you notice?

  3. Mars’s axis is tilted at 25 deg. What are seasons on Mars like?

  4. Mars’s axis tilt changes dramatically. What happens when the tilt is less/more?

  5. Artist’s depiction of an ‘icy Mars’

  6. Do the Earth and Mars have similar interiors? Why? How do we even know what’s inside a planet?

  7. Atmospheres: Are they similar?Why? Constituents: Nitrogen: 78% Oxygen: 21 % Argon: 0.9% Water: > 1% Carbon Doxide: 0.002% Carbon Doxide: 95.% Nitrogen: 3% Argon: 2% Oxygen: 0.1% Water: > 0.03%

  8. Is there water on Mars? Why or why not?

  9. Is there water on Mars? Why or why not? Mars’s south pole

  10. Is there water on Mars? Why or why not?

  11. Phase Diagram of Water Partial Pressure of Water Earth Mars Temperature

  12. Mars or Earth?

  13. Mars or Earth? Columbia Hills, Mars Atacama Desert, Chile Columbia Hills, Mars

  14. Mars or Earth?

  15. Kilauea Volcanoe, Hawaii Olympus Mons, Mars Mars or Earth?

  16. Mars or Earth?

  17. Dubai, UAE Endurance Crater, Mars Mars or Earth?

  18. What is the evidence for past water on Mars?

  19. Mars or Earth?

  20. Mars or Earth? Djado Plateau, Niger Valles Marineris, Mars

  21. Mars or Earth?

  22. Holden Crater NE, Mars Lena Delta, Argentina Mars or Earth?

  23. Mars or Earth?

  24. Yemen Mars Mars or Earth?

  25. Mars or Earth?

  26. Niger Mars Mars or Earth?

  27. Seven minutes of terror Curiosity descent http://www.youtube.com/watch?v=gZX5GRPnd4U Google Mars

  28. Mars: Take-away messages • Although smaller than Earth, Mars and Earth are similar in many ways. • Mars and Earth have similar interiors, although Mars has no liquid outer core, and so no magnetic field. • Mars geology is/was formed by cratering, volcanism, tectonics and erosion by wind AND WATER! • (Plate tectonics doesn’t seem to have been important) • Mars’s atmosphere is very different from Earth’s - lower mass, and full of CO2. • Mars’s small atmosphere and low temperature makes liquid water unstable at its surface (at least right now).

  29. Percival Lowell’s Mars Lowell’s Map of Mar published in 1895

  30. Viking’s Mars 1976

  31. Viking’s Mars 1976

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