UT AST 309L - Life in the Outer Solar System (24 pages)

Previewing pages 1, 2, 23, 24 of 24 page document View the full content.
View Full Document

Life in the Outer Solar System



Previewing pages 1, 2, 23, 24 of actual document.

View the full content.
View Full Document
View Full Document

Life in the Outer Solar System

86 views


Pages:
24
School:
University of Texas at Austin
Course:
Ast 309l - Search for Extraterrestrial Life
Search for Extraterrestrial Life Documents

Unformatted text preview:

Life in the Outer Solar System Jupiter Big Massive R 11R M 300 M 2 5 all the rest Thick Atmosphere Mostly H2 He But also more complex molecules Colors storms Like Miller Urey Life in Jupiter Atmosphere Sagan Salpeter etc Sinkers Floaters Hunters Plankton Fish Fish Galileo Results on Jupiter Reached Jupiter Dec 1995 Sent probe into Jupiter s atmosphere at 100 000 mile hour Decelerated at 230 g Lasted for 57 min Found Strong winds Turbulence little lightning Surprise Little or no H2O May have entered in an unusual place fewer clouds Life less likely Europa Moon of Jupiter Surface Fractured Ice Subsurface Oceans Heated from Inside Close up of ice floes Galileo Jupiter s Moons http www jpl nasa gov galileo index html Europa has a THIN atmosphere UV H H H H 2O O O O T h in O2 AT M Pressure 10 11 Earth More evidence for resurfacing along cracks by ice geysers fluid ice or liquid water Organic molecules on Callisto Ganymede maybe Europa Saturn Big 9 4 R Massive 95 M Year 29 5 years Day 0 43 days Composition similar to Jupiter Titan Moon of Saturn Diameter 0 4 Earth Atmospheric Pressure 1 5 Earth 85 Nitrogen BUT Cold 90 K Reducing atmosphere Haze Lab for prebiotic chemistry The Cassini Huygens Mission Launched 10 13 97 Arrived Saturn 7 2004 Cassini studies Saturn Moons Huygens Dropped onto Titan Study atmosphere Surface CASSINI SPACECRAFT Huygens Probe Released from Cassini Slowed by heat shield Parachute deploys Soft landing Sample gases in atm Results so far High winds 430 km hr at 120 km Titan Surface 10km up Mosaic of images Taken during descent Clearly shows features Photo ESA Titan Photo ESA River channel Coastline Liquid is present Methane CH4 Water Rift and Methane Springs Straight feature Water ice extruded Stubby channels Methane springs Lakes at northern latitudes Radar mapping of northern latitudes 2006 Strong evidence for liquid lakes And big cloud of ethane C2H6 Ethane raining or snowing into lakes Lakes and Islands Image from Feb 2007 based on radar Large



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Life in the Outer Solar System and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Life in the Outer Solar System and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?