UT AST 309L - AST 309L Review sheet for Exam 2 (8 pages)

Previewing pages 1, 2, 3 of 8 page document View the full content.
View Full Document

AST 309L Review sheet for Exam 2



Previewing pages 1, 2, 3 of actual document.

View the full content.
View Full Document
View Full Document

AST 309L Review sheet for Exam 2

111 views


Pages:
8
School:
University of Texas at Austin
Course:
Ast 309l - Search for Extraterrestrial Life
Search for Extraterrestrial Life Documents
Unformatted text preview:

AST 309L Review sheet for Exam 2 This document assumes you have completed all the reading and have looked over the suggested questions at the end of each chapter This review first outlines the material you are supposed to read then gives some sample questions from each part of the exam and finally gives a long narrative review document that goes over the material from chapters 5 and 6 in more detail and with commentary Material on Chapter 11 detection and properties of exoplanets and biosignatures This is ONLY sec 11 2 lecture notes and Wikipedia Extrasolar planets 11 3 The possibility that the Earth is rare and 11 4 the Hertzsprung Russell diagram are not on the exam We may cover 11 3 after the exam In Wiki Link to page on Methods of detecting extrasolar planets up to date of notable exoplanet discoveries with links See Gliese 581c d Link to separate article on superearths Read Cosmic Calculations 11 1 p 377 Understand implications of Figure 11 17 Section on Life detection is brief but was covered in more detail in class Know something about Kepler GAIA SIM Terrestrial Planet Finder Darwin especially what technique each will use The topics in 11 2 are straightforward if technical in places so you should let the suggested end ofchapter questions and the review and sample questions given here be your guide Also notice that we covered this in more detail in class especially the material on direct detection and biomarkers Nearly all of this can be condensed into three areas 1 The different techniques used for exoplanet detection The only topic in the text not covered in class or on the exam is the technique of gravitational microlensing although I do expect you to have a simple idea of what that phrase means but you don t have to know any of the advantages or disadvantages of the technique 2 Properties of exoplanet systems discovered so far e g surprising differences or similarities to our solar system 3 Strategies for detection of biomarkers in exoplanet absorption spectra what molecular bands are we searching for and why and reflection light curve and spectrum End of chapter questions RQ 3 13 QQ30 34 Material on Chapters 5 and 6 Life origin of life The material on origin of life is in some ways more challenging and intricate than that on extrasolar planets I wanted to go a little deeper than the textbook and so we have not caught up yet with the syllabus For those reasons I am restricting the exam to cover material in Chapter 5 up to but NOT including 5 5 extremophiles and will postpone sec 6 1 In Sec 6 2 the assigned reading has been reduced to a part of How did life begin on pp 198 200 only the subsections The Miller Urey experiment Other sources of organic molecules and The transition from chemistry to biology because I have been including these topics repeatedly as part of the lectures so far I will include a few extra slides on Miller Urey in the pdf online but will not have time to discuss in class Do read RNA World which we will pick up again after this exam It turns out that most of the material that we intended to cover in this part of the course Ch 5 and 6 actually fit better with the material for Part IV of the course evolution of life and Earth since most of it is about the history of life not the origin of it For that reason I want you to look through sec 5 5 life in extreme environments but I will not question you about it on the exam You should only realize why this topic may have nothing to do with the origin of life only its later adaptations Past experience shows me that it is difficult to ask multiple choice questions about extremophiles anyway Wiki entry on Abiogenesis Many of the entries are short but link to their own entries in Wiki Most of these are for your own interest and just to get an idea how long your textbook would be if they discussed all the ideas for the origin of life Specific topics you should read are mentioned in the long review below Be sure to try the review questions at the end of chapters 5 and 6 They are slightly altered to reflect altered reading list Chapter 5 RQ 3 6 9 12 not 3 14 as on original reading sheet QQ 34 Chapter 6 RQ 4 7 not 1 3 QQ 33 36 not 37 A long narrative review follows after sample questions AST 309L review sheet continued Review and sample questions You should be able to give clear answers in your own words without relying on notes or jargon to the questions listed below I will be glad to discuss the material with you either on the phone or at my office or in class but please do not ask for answers to any of the questions on this handout If you can t answer them you need to study more Part I Extrasolar planets A Some review questions Be sure you can give clear and in some cases concise answers Some of these are similar to questions occurring on the exam although they will be encountered in the form of multiple choice questions List and describe various observational methods for searching for planets including their advantages and limitations The answer to this would be fairly lengthy Explain why it is so difficult observationally to directly detect a planet orbiting another star Which of the proposed methods for detecting invisible planets around nearby stars can best or only be used in cases where our line of sight to the star lies perpendicular to the plane of the planet s orbit i e planet s orbit is in the plane of the sky How about the parallel case What are free floating planets and how might one be discovered What is the current status of detections of extrasolar planets Discuss the masses and orbital characteristics What are the selection effects that cause us not to be able to reach definitive conclusions about say the fraction of stars with planets Why is it that the confirmed detection of extrasolar planets around a pulsar might not be very useful or at least ambiguous for answering the planet formation questions of most interest for our course Describe a few of the major proposed space missions SIM Kepler TPF Darwin designed to detect extrasolar planets and the techniques they will employ What is the fundamental reason why Kepler will be able to detect smaller mass planets than ground based programs Certain elements have recently been discovered in the atmosphere of an exoplanet What elements What property of this exoplanet system allows astronomers to see these elements What do these observations tell us about the eolution of the exoplanet Discuss which spectral or other biosignatures are expected to be


View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view AST 309L Review sheet for Exam 2 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 AST 309L Review sheet for Exam 2 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?