Download
slide1 n.
Skip this Video
Loading SlideShow in 5 Seconds..
What do we need for life like us? PowerPoint Presentation
Download Presentation
What do we need for life like us?

What do we need for life like us?

132 Views Download Presentation
Download Presentation

What do we need for life like us?

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. What do we need for life like us? planet star What is a star needed for? energy

  2. Solar Energy plants solar energy used to make complex molecules food animals eat plants for energy wood solar energy stored in chemical form fossil fuels coal oil nat gas plants and animals hydroelectric sun lifts water wind sun drives wind

  3. Solar Energy nuclear fission uranium underground supernova geothermal Iceland Calistoga geysers planet tidal high tide fills bay low tide empties moon What doesn’t come from our environment?

  4. temperature/speed average speed some slower some faster some much faster temperature bombardment pressure blown

  5. 1H 2H 3H 4He 3He Ionized Isotopes

  6. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

  7. Nuclear Forces repulsive attractive weak strong long range close range

  8. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

  9. E=mC2 e+ e- + Proton-Proton Chain n + 1H 1H 2H e+ + + mass charge proton high + neutron high 0 electron low - positron low + matter anti-matter annihilation matter → energy

  10. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

  11. n + 6 sec g + + 2H 1H 3He Proton-Proton Chain + 1H 1H 2H e+ + g + + 2H 1H 3He

  12. n + + 1H 1H Proton-Proton Chain + 1H 1H 2H e+ + g + + 2H 1H 3He + 3He 3He + 4He

  13. Radiation Conduction Convection Transparent Contact & Good Conductor Fluid or Gas Energy Transport What conditions are required?

  14. Random Walk

  15. Star Forming Region

  16. Star Forming Region

  17. Star Forming Region

  18. Star Forming Region

  19. Star Forming Region

  20. Star Forming Region

  21. Star Forming Region

  22. Star Forming Region

  23. Star Forming Region

  24. Star Forming Region

  25. Star Forming Region

  26. Protostars

  27. Protostars

  28. Protostars

  29. Gas Cocoon Protostar

  30. Lost Potential Energy Gaining Kinetic Energy Gaining Speed Gas Cocoon Gas Rising Temperature Gravity pulls inward. Some other force pushes out. Gas pressure pushes outward. Stops Collapse

  31. Cocoon Where is the temperature highest?

  32. Radiation Cools Protostar Heats Cocoon Escape Velocity? Convection

  33. Cools Protostar Heats Cocoon Escape Velocity?

  34. Cools Protostar Heats Cocoon Escape Velocity? Protostar Collapse

  35. Stellar Wind Sheds Outer Layer Mass Loss

  36. Stellar Wind Sheds Outer Layer Mass Loss

  37. Stellar Wind Sheds Outer Layer Mass Loss Collapse Continues

  38. Convection? Core Energy Transport Slows

  39. Core Fusion H He

  40. g n e+ + g CNO Cycle + + 1H 13N 12C + 13N 13C + 13C 1H + 14N

  41. g n e+ + CNO Cycle + 14N + 1H 15O 15O + 15N 15N + 4He 1H 12C +

  42. Stellar Wind Cocoon Gone Star Exposed

  43. First star disrupts later stars.

  44. n + + 1H 1H Proton-Proton Chain + 1H 1H 2H e+ + g + + 2H 1H 3He + 3He 3He + 4He

  45. Long Main Sequence Life Millions of Years for Some Billions of Years for Others Mostly Stable Energy Output Mostly Stable Size Gradual Increase in Both Core H He