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FSU - AST 1002 - Planets, Stars and Galaxies Final Study Guide - Study

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Schools > Florida State University > Physics > AST 1002 > FSU - AST 1002 - Planets, Stars and Galaxies Final Study Guide - Study

FSU - AST 1002 - Planets, Stars and Galaxies Final Study Guide - Study

School: Florida State University
Department: Physics
Course: Planets, Stars and Galaxies
Professor: Vladimir Dobrosavljevic
Term: Fall 2016
Tags: planets, stars, Galaxies, and AST1002
Name: Planets, Stars and Galaxies Final Study Guide
Description: This study guide goes over the final chapters covered in class that will be on the final.
Uploaded: 12/09/2017
0 5 3 6 Reviews
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background image Newton vs. Einstein   Newton’s laws are an approximation they work in special cases  Gravity is a force across empty space  F=ma; F= Gm 1 m 2 /d 2 ­ inverse square law   Motion inertia, forces, acceleration Do not work in the presence of large masses  Einstein­ spacetime can be seen as a sheet that curves as a mass is placed on it  Explains why Earth orbits around the sun  When Gravity Wins   Stars form  Stars collapse and explode  Galaxies form  Galaxies merge  Keeps stars and planets in orbit  Lets us know that Dark matter exists, 9­% Rotational curves reveal dark matter Stars very far from the center orbit too fast  Fate of the Universe depends on it (density of mass and energy) Hubble’s Law  ­ Expansion rate of the Universe  If we measure distances and velocities we find Hubble’s Law  v r =H 0 d G Larger H 0  value means faster expansion and means younger universe The velocity at which a galaxy is moving away from us is proportional to the 
distance of that galaxy 
A galaxy twice as far is moving away twice as fast  Galaxies that are farther are moving away more quickly, greater redshift Doppler   Towards­ blue; Away­ red; Perpendicular­ neutral  Andromeda is blueshifted  Cosmological redshift­ photons are stretched along expanding space  Big Bang Hot dense plasma, Non­transparent  In a cooler universe where atoms can exist, star systems begin to form  Expansion= cooling  Speed of light  (c) is the universal speed limit  Nothing travels faster than light  Electromagnetic waves travel with speed c no matter the wavelength  c= wavelength x Frequency  Observing distant galaxies = peering into the past  Lightyear is a distance  Light takes about 8 min to travel to the sun 

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School: Florida State University
Department: Physics
Course: Planets, Stars and Galaxies
Professor: Vladimir Dobrosavljevic
Term: Fall 2016
Tags: planets, stars, Galaxies, and AST1002
Name: Planets, Stars and Galaxies Final Study Guide
Description: This study guide goes over the final chapters covered in class that will be on the final.
Uploaded: 12/09/2017
2 Pages 51 Views 40 Unlocks
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