How_Common_Life - How Common Is Life? Stephen Eikenberry 09...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
How Common Is Life? Stephen Eikenberry 09 November 2010 AST 2037 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Pop Quiz (Yeah!) 1. Do we think there is liquid water anywhere in the Solar System besides Earth? If so, where? 1. What is the “Habitable Zone”? 1. For M-dwarfs stars, what is one reason we think life may not develop even on planets in their Habitable Zone? 2
Background image of page 2
Summary from Last Time We have found hundreds of planets around other stars Overwhelming majority are massive gas giants, many close to their parent star This is because they are easiest to find with the Doppler technique Have found: multiple planet systems (20+); planet atmospheres; some low-mass (probably solid) planets So far, only a few gas giants in the HZ; no solid planets; maybe moons could host life (??) Future searches will be sensitive to Earth-mass planets in the HZ 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Eccentricity Exo-planets have a wide range of eccentricity Many have eccentricity MUCH higher than Pluto 4
Background image of page 4
Eccentricity Effects Why is eccentricity bad for life? 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Eccentricity Effects Why is eccentricity bad for life? Planet moves in and out of the Habitable Zone Many of these are giant planets Strong gravitational pull disrupts orbits of smaller
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/26/2011 for the course AST 2037 taught by Professor Eikenberry during the Fall '08 term at University of Florida.

Page1 / 17

How_Common_Life - How Common Is Life? Stephen Eikenberry 09...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online