lecture_21 - www.nineplanets.org Lattimer, AST 248, Lecture...

Info iconThis preview shows pages 1–6. 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

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

View Full DocumentRight 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: www.nineplanets.org Lattimer, AST 248, Lecture 21 – p.1/17 T i t a n • Only moon with substantial atmosphere, 1.5 times Earth’s • Saturn’s largest satellite and second largest in Solar System • Atmosphere a result of relatively cold temperature and high gravity • Major gases are N 2 (98.4%), CH 4 (1.6%), Ar; smog (hydrocarbon, tholin) at high altitude. • Lack of noble gases Kr, Xe and Ne suggest atmosphere formed as a result of outgassing rather than by cometary impacts. • Haze results in anti-greenhouse effect: opaque to visibile, clear to infrared. • Methane (CH 4 ) is present and must be replenished, indicating volcanos or lakes of methane or ethane (C 2 H 6 ). • Cassini probe mapped surface in 2004. • Surface temperature is 94 K, methane rain may exist • Surface is complex, fluid-processed and geologically young (H 2 O and NH 3 volcanos?) Lattimer, AST 248, Lecture 21 – p.2/17 T i t a n ’ s I n t e r i o r NASA Evidence for H 2 O-NH 3 ocean from ELF radio waves Lattimer, AST 248, Lecture 21 – p.3/17 T i t a n ’ s C l i m a t e NASA Lattimer, AST 248, Lecture 21 – p.4/17 Lattimer, AST 248, Lecture 21 – p.5/17Lattimer, AST 248, Lecture 21 – p....
View Full Document

This note was uploaded on 01/25/2012 for the course AST 248 taught by Professor Walter during the Spring '08 term at SUNY Stony Brook.

Page1 / 17

lecture_21 - www.nineplanets.org Lattimer, AST 248, Lecture...

This preview shows document pages 1 - 6. Sign up to view the full document.

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