Lecture 13

Lecture 13 - ASTR100Lecture13 24/02/200913:55:00 Review

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ASTR 100 Lecture 13 24/02/2009 13:55:00 Review     Comparative planetology how do we explain this information about Jovians and terrestrials?  -Later: debris (like Pluto)  Core Message: Planets are products of the environment in which they form -Most particularly the temperature of the environment (farther from the sun is  colder)  More data: Abundance of the elements, hydrogen, helium, etc. (the periodic table) (We know  this because of spectroscopy)  2 aspects: 1. Universe as a whole 2. Solar system  A. Universe as a whole Hydrogen 75%, helium 24%, 1% other  B. Solar System 71% hydrogen,  27% Helium, 2% other 
Background image of page 1

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

View Full DocumentRight Arrow Icon
Comment:     1. Why this mix? A. will be addressed in the last part of the course (Big bang) B.  addressed in the next part of the course Stellar physics (stars) Take B as given 2. Proportions/abundances in A) B) are by mass Solar system Hydrogen and Helium 71%, 27% (Jovians) Terrestrials are the 2%  oher By molecule 84%, 15% Why is this? Counting by mass and counting by number  are different, mass is more. Number less.  Why are jovians so much bigger tan terrestrials? 98% Hydrogen, helium in solar system  Follow up: how did the matter get distributed as it did? Major Theme 1:      Planetary Atmospheres What enables the planet to hold an atmosphere  What factors cause loss or growth of an atmosphere. Why is there an atmosphere on earth and not on the moon? (Jovians
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/12/2009 for the course ASTR 100Lxg taught by Professor Dappen during the Spring '07 term at USC.

Page1 / 10

Lecture 13 - ASTR100Lecture13 24/02/200913:55:00 Review

This preview shows document pages 1 - 3. Sign up to view the full document.

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