Alien Earths

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A recent talk I gave at the Newcastle Museum on exoplanets, and their chances for life.

Text of Alien Earths

  • 1. A L I E N E A R T H S D R C R A I G O N E I L L D E PA R T M E N T O F E A R T H & P L A N E TA RY S C I E N C E C C F S A R C N A T I O N A L K E Y C E N T R E M A C Q U A R I E U N I V E R S I T Y
  • 2. W H AT D O E S L I F E N E E D ? M A R I N E TA R D I G R A D E
  • 3. L I Q U I D WAT E R T H E G O L D I L O C K S Z O N E
  • 4. L I F E A R O U N D A B L U E S U P E R G I A N T ?
  • 5. T H E P E R I L S O F R E D D WA R F S M-class stars
  • 6. L I Q U I D WAT E R E V O L U T I O N O F T H E H A B I TA B L E Z O N E
  • 7. Life under a cold star On Earth And on Mars
  • 8. A N E V O LV I N G G R E E N H O U S E L I Q U I D WA T E R F O R 4 . 4 G A
  • 9. P L AT E T E C T O N I C S W H A T I S T H E E A R T H D O I N G R I G H T ?
  • 10. E A R T H S T H E R M O S TAT Plate tectonics
  • 11. S O U R C E O F V O L C A N I C G A S E S - M O S T LY C O 2 A N D WAT E R ! R E C Y C L E S WAT E R A N D C O 3 I N T O T H E M A N T L E ! C R E AT E S M O U N TA I N S A N D T O P O G R A P H Y - W E AT H E R I N G O F T H E S E ( T H E C O 2 - S I L I C AT E W E AT H E R I N G C Y C L E ) I S O N E O F T H E M A J O R C O 2 S I N K S O F G E O L O G I C A L T I M E S . ! G E N E R AT E S H I G H C O R E H E AT F L U X - W H I C H P O W E R S T H E M A G N E T I C F I E L D - W I T H O U T W H I C H W E L O O S E AT M O S P H E R E FA S T. ! S E E A L S O WA R D A N D B R O W N L E E , 2 0 0 0 ( R A R E E A R T H ) . W H Y I S P L A T E T E C T O N I C S I M P O R TA N T ?
  • 12. P L A T E T E C T O N I C S O N Mars? Venus? Kepler 186f?
  • 13. I N 2 0 0 7 . . . ! VA L E N C I A , D . , R . J . O C O N N E L L , A N D D . S A S S E L O V ( 2 0 0 7 ) , I N E V I TA B I L I T Y O F P L A T E T E C T O N I C S O N S U P E R - E A R T H S , A S T R O P H Y S . J . , 6 7 0 , L 4 5 , D O I : 1 0 . 1 0 8 6 / 5 2 4 0 1 2 . ! P L A T E T E C T O N I C S O N G L I E S E 5 8 1 D ?
  • 14. A S U P E R E A R T H S I M U L AT I O N
  • 15. In 2007
  • 16. - O N E I L L , C . , A N D A . L E N A R D I C ( 2 0 0 7 ) , G E O L O G I C A L C O N S E Q U E N C E S O F S U P E R - S I Z E D E A R T H S , G E O P H Y S . R E S . L E T T. , 3 4 , L 1 9 2 0 4 , D O I : 1 0 . 1 0 2 9 / 2 0 0 7 G L 0 3 0 5 9 8 . thus super-sized Earths are likely to be in an episodic or stagnant lid regime. S U P E R V E N U S ?
  • 17. PA P E R S F O R P L A T E T E C T O N I C S
  • 18. PA P E R S A G A I N S T P L A T E T E C T O N I C S
  • 19. W H AT I S N E P T U N E E V E N M A D E O F ? What is the habitability of exoplanets?
  • 20. D O W E N E E D P L AT E T E C T O N I C S F O R H A B I TA B I L I T Y ?
  • 21. T H E A R C H A E A N And then there was
  • 22. H T T P S : / / W W W. FA C E B O O K . C O M / A L I E N E A R T H S