Exploring the Universe
Exploring the Universe ASTR 1030
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This 13 page Class Notes was uploaded by Ezequiel Stokes on Wednesday September 23, 2015. The Class Notes belongs to ASTR 1030 at Middle Tennessee State University taught by Charles Higgins in Fall. Since its upload, it has received 52 views. For similar materials see /class/213149/astr-1030-middle-tennessee-state-university in Astronomy at Middle Tennessee State University.
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Date Created: 09/23/15
What is the cosmological redshift o The stretching ofwavelengths ofphotons oflight as they travel through expanding space According to Hubble s law how old is the universe 0 age 1 H What is the Hubble classification for a spiral galaxy with a large nuclear region and tightly wound arms 0 Sa What would you expect would be the overall color ofa globular cluster of stars 0 Red because of the older population of stars in the cluster Which of the following is NOT useful for mapping the locations and shapes of the spiral arms in our Galaxy 0 the distribution of globular clusters Based on what you know about the expansion of the universe an observer from some other galaxy not the Milky Way would see 0 all galaxies moving away from the observer with more distant galaxies moving faster According to the Hubble classification scheme an E6 galaxy o is atter looking than an E2 galaxy One of the consequences of the collision of two galaxies appears to be 0 a burst ofincredible star formation What is the cosmic microwave background radiation 0 radiation left over from the Big Bang after the universe expanded and cooled The Andromeda Galaxy M31 is best described as o a spiral collection of stars dust and gas about 2 million lightyears away An astronomer studying a distant galaxy finds that its recessional velocity is 14000 kms If Hubble s constant is 70 kmsMpc what is the distance to this galaxy o 200 Mpc Why does the OBSERVABLE universe have an edge 0 because we cannot see any further out into space than the distance that light has traveled over the lifetime of the universe What condition is necessary for the universe to be unbounded infinite in extent 0 the density of the universe must be less than some critical value What is the galaxy content ofa rich dense cluster like the Coma cluster 0 mostly elliptical galaxies and relatively few spirals What is a barred spiral galaxy o a galaxy with a bar through the nuclear bulge and the spiral arms starting from the ends of the bar l 10 Test 1 Review Chapters Ch 0 Ch 1 Ch 2 50 questions Multiple Choice and TF All formulas will be given 39 Can use a calculator Some diagrams given for some questions Lunar Phase Diagram 39will NOT be given Makeupof the Universe Scientific Notation Appendix 1 Units of DistanCe Astronomical Unit AU Light year ly I The Scientific Method Constellations Celestial Sphere Angles 39 Celestial Poles Equator Zenith Latitude Motion of the Sun Earth s Motions rotation revolution The Seasons Lunar Phases 39 Chapter 0 Summary Eclipses 39 1 Chapterl Summary Scientific Method 2 Parallax 3 LWN NP FnPFA N 3 laws of planetary motion Law of Gravity Weight amp Mass History Aristotle Ptolemy Copernicus Brahe Kepler Galileo Newton Remember basic highlights Earth or Suncentered discoveries etc Chapter 2 Summary Electromagnetic Radiation 39 wavelength photon energy visible range high and low energies Blackbody Radiation ColorTemperature Wien s Law TemperatureEnergy StefanBoltzmann Law 3 types of Spectra amp Kirchhoffs Laws Model Atom Doppler Effect l r Ramp w wgem i with 33 Ml 1153 Ito i l Pmd ietma 22 3 Li Test 1 Practice Questions 1 AwaXing crescent Moon is Visible at midnight a True b False 2 Athird quarter Moon rises approximately at midnight a True b False Test 1 Practice Questions 3 Ifthe Earth s tilt were only 10 instead of 235 how would this affect the climate of the Earth compared to our climate now a Longer summer days and shorter winter days b The Sun would be below the horizon longer in the winter c The Earth s climate would not change d Warmer winters and cooler summers e Cooler winters and warmer summers 4 Kepler deduced his laws of planetary motion using observations made by a Tycho Brahe b Copernicus c Galileo d Aristotle e Ptolemy 5 0 1 9 Test 1 Practice Questions What is the phase of the Moon if it rises at dawn a New b First Quarter c Third Quarter d Full e Waxing Crescent What is the angle between the northern horizon and the North Star Polaris if your latitude is 75 degrees North 15 degrees 75 degrees 165 degrees 40 degrees 75 degrees 7 235 degrees 3853 e Test 1 Practice Questions Newton s law of gravitation says that the force between two bodies is proportional to the product of the two masses and a Decreases as the square of the separation increases b Increases as the square of the separation increases c Decreases as the square of time increases d Also depends on the chemical composition of the objects e Is universally constant What s the phase of the Earth if you were standing on the Moon when the Moon was New phase a New b 1st Quarter c 3rd Quarter d Waxing Crescent e Full 9 Test 1 Practice Questions Which astronomermathematician rst observed phases for an object other than the Moon a Kepler b Copernicus c Newton d Galileo e Einstein At the present time the largest known structures in the Universe are a Star clusters b Black Holes c The local group of galaxies d Galaxies e Superclusters Test 1 Practice Questions Answers lb 2a 3d 4a 5a 6b 7a 8e 9d 10e 10112011 L rwill39be amenim den fyl39loqk atyeur ctures 1h Da39plane39t cumpansuhs39 gobk aims Homewm aware 10112011 10112011 Slide 1 Can you identify this planet Slide 2 Can you identify this planet Slide 3 Can you identify this planet 10112011 Slide 4 Can you identify this moon 1 The smallest planet in the solar system is rs D Mercury E Jupiter 2 Choose the solar system object LEAST like a terrestrial planet MP 3 E D Neptune 10112011 3 The following four statements are typical ofa certain object in the solar s stem 1 Temperatures below zero degrees Fahrenheit exist Oh the surface 2 Rotatmh period is lessthah one month 3 The object has ohe kl lOW Satellite 4 The Orbit is very eccentric O rCll CUlal The object is Mars Mercury Pluto Neptune Venus quotPPP39P 4 The composition of Saturn is mostly Hydrogen and Helium Methane Water Ammonia Rock and Metal WPPP P 5 The outer solar system 1 Is dominated by light gases and ices 2 contains nearly all over 90 ofthe known planetary satellites 3 contains all the ringed planets The most correct answer is A 1 B 2 C 1 and 2 D 1 2 and 3 E 2 and 3 10112011 6 Match the planets characteristics in Column 1 with the correct planet In Column 2 1 Largest orbital eccentricity A Mars 2 Closest planet to the Sun B Jupiter 3 Smallest average density C Pluto 4 Great red spot D Saturn 5 Atmosphere mostly COZ E Mercury A 1C 2E 3D 4B 5A B 1E 2A 3C 4B 5D C 1C 2E 3B 4D 5A D E 1C 2B 3E 4D 5A 1A 2B 3E 4D 5C 7 Jupiter emits more energy than it receives from the Sun internal heat source Jupiter probably produces this heat from A By nuclear fusion of hydrogen to helium B By accreting comets and asteroids that come near I C By its tidal pull on its moons D By its magnetic eld E By slow gravitational contraction 8 One of the most unusual aspects of Uranus compared to most other planets is A Seasons very nearly like those of Earth B An axis of rotation nearly in the plane of its orbit C It has an atmosphere that is mostlymethane D A mass larger than Jupiter E The largest ring system is the solar system 10112011 9 On which body would youexpect the LEAST number of impact craters A Earth B lo C Mercury D Pluto E 10 The planet that comes CLOSEST to Earth in its orbit is E Saturn 11 Why is the atmospheric activity clouds bands storms etc much less on Uranus than on Neptune Uranus does not have a magnetic eld Uranus is too small to have atmospheric activity Uranus does not have an internal heat source Uranus s rotational axis is tipped over onto its side about 90 degrees Neptune has a much greater mass than Uranus m 009