lecture17 - 1 Extraterrestrial Life Spring 2008 Saturn...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Extraterrestrial Life: Spring 2008 Saturn system Gas giant: smaller than Jupiter… about 95 Earth masses • rings: extend from 6,000-120,000 km above the equator of Saturn… made up of mostly small icy particles • orbital radius is 9.6 AU - planet formed in a still colder part of the protoplanetary disk in which hydrocarbon ices as well as water ice were present Extraterrestrial Life: Spring 2008 Satellites of Saturn Large number ~60 moons Enceladus : 500km diameter moon, orbital radius 240,000km Titan : 5150km diameter - second largest moon in the Solar system after Ganymede • orbital radius 1.2 million km • orbital period (Saturn) 16 days • orbital period of Saturn ~30 years Solar Fux ~1% of value at Earth Temperature in absence of greenhouse effect ~80K Extraterrestrial Life: Spring 2008 Both satellites are of interest for astrobiology: Enceladus : possible existence of liquid water in the subsurface - plumes mean that it is easily accessible to measurements! Titan : no evidence for liquid water, but many similarities to the early Earth - may provide information on the chemistry that preceded life on Earth The ESA Huygens probe landed on Titan early in the...
View Full Document

This note was uploaded on 08/31/2009 for the course GEOL 3300 taught by Professor Staff during the Spring '08 term at Colorado.

Page1 / 3

lecture17 - 1 Extraterrestrial Life Spring 2008 Saturn...

This preview shows document pages 1 - 2. Sign up to view the full document.

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