class18a - AST 309S The Solar System MWF 11-12 John Lacy...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
AST 309S The Solar System MWF 11-12 John Lacy RLM 16.332, M-F 12-12:30 471-1469 lacy@astro.as.utexas.edu Amanda Bayless Daniel Kagan RLM 16.312, Th 10-12 RLM 16.322A, W 3-5 471-3462 471-6858 baylessa@astro.as.utexas.edu kagan@astro.as.utexas.edu class website: www.as.utexas.edu courses AST 309S username: AST password: 309
Background image of page 1

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

View Full DocumentRight Arrow Icon
Topics from chapter 5.1-5.4 pressure, temperature, and the gas law escape of atoms and composition of atmospheres spectra of gasses: emission and absorption spectra spectra of atoms and spectra of vibrating molecules heat flow in atmospheres: convection and radiation black-body radiation equilibrium temperature of a black rock at different distances from Sun effect of albedo on temperature effect of atmosphere on temperature: greenhouse effect changes in the Earth’s atmosphere and temperature feedback
Background image of page 2
Reading for this week Chapter 5: Atmospheres of Terrestrial Planets Today How an atmosphere affects emitted radiation
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
Who do you believe? I hope that if you can do some of the calculation yourself you will have a better idea of which side is more likely to be right.
Background image of page 6
Equilibrium temperature Power emitted = Power absorbed (emitting area) x σ T 4 = (absorbing area) x (flux of sunlight) x (fraction of sunlight absorbed) For a sphere, emitting area = 4 x absorbing area (because only the side facing the Sun is heated). σ
Background image of page 7

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

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 17

class18a - AST 309S The Solar System MWF 11-12 John Lacy...

This preview shows document pages 1 - 8. Sign up to view the full document.

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