Astronomy Exam 2 Study Guide
Astronomy Exam 2 Study Guide AST 111
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This 5 page Study Guide was uploaded by Ashley Childers on Saturday October 3, 2015. The Study Guide belongs to AST 111 at University of Southern Mississippi taught by Christopher Sirola in Summer 2015. Since its upload, it has received 234 views. For similar materials see General Astronomy in Physics 2 at University of Southern Mississippi.
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Date Created: 10/03/15
Astronomy Exam 2 Study Guide Identify 1 Purpose of telescopes 2 Type of Telescope Lily hit is Being Tammi1min IF u all with a smaller area anIII Far allllell Iliight rays ifmm star iI39 Eyepiata li liens ilF39fillil Elli f Ian Ti liiiSE IITWEE spherical liens and this eyepiece tallied the primary lens liens manila lill1e eeneentrateci eelieete an enneentraj light Faye parallel again the liglht liht l eyepece cancave mirror l E w e39i a quotl l 39 r39r w 39 i H r l 1quot l l l y I h flat i i39ill ii 3 Type of Telescope Acadanw maarlta 4 Re ectors a Advantages b Disadvantages 5 Refractors a Advantages b Disadvantages De ne Filter Granulation Flares Gravity Star Jovian Planet Terrestrial Planet Minor Planet Satellite Asteroid Comet Gas pressure Angular Momentum Short Answer 6 Who is Laplace and what did he do 7 Explain the Nebular Hypothesis Fill in the Blank Characteristics of Earth 8 Orbital Characteristic a b c d Semimajor axis Orbital period Eccentdchy Average Speed 9 Rotational characteristics 10 11 12 13 14 15 a b n 0390 0390 0390 0390 0 Sidereal day Precession Period Obliquity tilt Physical Characteristics Mass Radius Denshy Escape Speed Surface Charactersitics Water Land Inner Core Composition Radius Temperature Outer Core Composition Radius ManUe Composition Radius Crust Types Answers 1 Purpose of telescopes a To make objects appear brighter gather light b To make objects clearer to improve resolution LTo make objects appear larger to magnify 2 Type of Telescope refractor 3 Type of Telescope reflector 4 Re ectors Advantages 0 Can be very large 0 Free of most aberrations Disadvantages 0 Secondary mirror blocks some light 0 Expensive 5 Refractors a Advantages i Simplicity of design ii Cost b Disadvantages i Limited in size ii Inherent blurriness aberrations De ne Filter cancels wavelengths of light to view speci c objectsfeatures Granulation bubbles of gas on the sun make the sun appear grainy Flares solar ejections of the sun Gravity attractive force determines orbits depends on mass and the distance between masses Star object that fuses hydrogen into helium naturally weight cases the star to collapse in on itself jovian Planet gas giants mostly of Hydrogen and helium low density many moons Terrestrial Planet close to stars within 15 AU small high density few moons Minor Planet small planets independent orbits moons too big to be asteroidcomet Satellite natural objects that orbit any object other than a star Asteroid not big enough to be considered planets made of rocks and metals close to the sun Comet quotdirty snowballsquot glow bright when close to the sun Gas pressure acts to push objects apart the smaller the object the higher Angular Momentum spin acts to atten the more concentrated the faster the spin Short Answer 1 Who is Laplace and what did he do a Astronomer who made the rst modern attempt in explaining the origin of the solar system 2 Explain the Nebular Hypothesis a A solar system is created is created with a large cloud nebula of gas and dust gravity pulls it together from then it begins to heat up and atten A Star of the majority of the mass forms at the center irregularities become more prominent with gravity After millions of years the star becomes surrounded by planets and moons orbiting on the same plane The composition of objects depends mostly on their distances from the sun and initial temperature Fill in the Blank 8 Orbital Characteristics 0 O O O Semimajor Axis 1AU 150 Mill Km Orbital period 1 year 3652422 solar days Eccentricity 0017 Average speed 30 kms 9 Rotational Characteristics 16 17 18 19 20 0390 0390 0390 0390 0 a Sidereal day 23 hours 56 minutes b Precession Period 26000 years c Obliquity tilt 23 12 degrees i Ranges between 220 245 degrees 15 Physical characteristics Mass598 x 10quot24kg Radius6370km Density554 gcc Escape speed112 kms Surface Charactersitics Water 71 Land 29 Inner Core Composition Solid IronNickel Radius 1200 km Temperature 6000 K Outer Core Composition Liquid IronNickel Radius 3400 km ManUe Composition liquid silicate rock silicon oxygen Radius 3400 km Crust Types oceanic continental
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