Lecture-8 - Lecture 8 Search for Extra-Solar Planetary Systems Review of the last lecture Difficulties in finding exoplanets How to find exoplanets

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10/24/11 Physics 20 Lecture 10 1 Lecture # 8: Search for Extra-Solar Planetary Systems Review of the last lecture Difficulties in finding exoplanets How to find exoplanets Observable properties of the exoplanets Seach for other Earth-like planets
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10/24/11 Physics 20 Lecture 10 2 Review: Nebular Theorem Planets were born in a spinning disk of material The spinning disk was mostly made of H and He with small fraction of heavier elements Terrestrial planets were formed in the warm inner regions where only metals and rocks could condense The jovian planets are formed in the outer regions where temperatures are low enough for H, He and their compounds to condense Since H, He are more abundant, the jovian planets grow to much bigger sizes Circular orbits of the planets are due to orderly motion of spinning disks
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10/24/11 Physics 20 Lecture 10 3 Solar Nebula Hypothesis Galactic re-cycling: the interstellar matter re-cycle and produce heavier elements in stars through nuclear fusion. This material is then re-cycled into a new generation of stars
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10/24/11 Physics 20 Lecture 10 4
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10/24/11 Physics 20 Lecture 10 5 Star forming regions Orion Nebula has been forming thousands of stars, some with planets around them. It will be forming stars for the next millions of years
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10/24/11 Physics 20 Lecture 10 6 Detecting Extrasolar planets Until around 1995, the planetary science was mainly confined to the study of our solar system Today, more than one hundred planets are discovered orbiting other stars The discovery of extrasolar planets has significant implications- this increases the chance that we might someday find life- also, it helps us to better understand our own planet, the Earth Sarch for other planetary systems would allow testing theories for formation of the solar system
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10/24/11 Physics 20 Lecture 10 7 Difficulties in finding Exoplanets
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This note was uploaded on 11/17/2011 for the course PHYSICS 20 taught by Professor Mubarek during the Spring '11 term at UC Riverside.

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Lecture-8 - Lecture 8 Search for Extra-Solar Planetary Systems Review of the last lecture Difficulties in finding exoplanets How to find exoplanets

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