Astro100_final_review

Astro100_final_review - Astronomy 100g Final Review Fall...

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Astronomy 100g Fall 2008, Neda Katz Final Review DISCLAIMER: THESE NOTES SHOULD HELP THE PREPARATION OF THE FINAL EXAM. AS USUAL, THE PURPOSE OF THESE NOTES IS TO INDICATE HOW THE ESSENTIAL MATERIAL CAN BE LEARNED. THEY ARE NOT INTENDED TO BE A COMPLETE LIST OF THE ESSENTIAL MATERIAL. • General Remark about Topics of the Final Exam The exam is somewhat cumulative, but not dramatically so. Emphasis will be strongly on the last topics of our lectures. However, I will use the opportunity to ask important questions of the earlier stuff, especially of the kind that pertain to the overall picture. Also, there are questions that strictly did not belong to any of the midterm sections, so the final will be the appropriate forum for those. As a simple example, consider this: Which of the following has the largest size: a) planet b) galaxy c) Sun d) globular cluster. This question could not be asked on the midterms because it requires knowledge of the whole course. A less trivial question is about the ‘spacing’ in the universe: how do stellar diameters and interstellar distances compare with galactic diameters and intergalactic distances? Lastly, what are the major lessons and tools of astronomy? The final exam will contain a few such questions. • Neutron Stars, Pulsars, Black Holes, Ch. 22 That’s what we forgot to test in Midterm 3. .. You do not have to know many details. Just to recall again that neutron stars are one of the 3 possible end states of the life of a star, that neutron stars are being observed as pulsars by radio astronomy, and that there are pulsars, and therefore neutron stars, in nebulae which are the ejecta of relatively recent supernova explosions, which together is beautiful evidence for the overall picture of stellar evolution! Only very basic stuff about Black Holes will be asked. • The Milky Way Galaxy (= Our Galaxy) and beyond, Ch. 23-24 We had our surprises earlier, when planets and stars, which superficially seen resemble each other, turned out to be radically distinct objects. Now, we are in for another surprise with the Milky Way, which can be easily mistaken for a gaseous nebula. However, from
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Astro100_final_review - Astronomy 100g Final Review Fall...

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