Spiral galaxy rotation - Study guides, Class notes & Summaries

Astro 102 Final Sets Questions With 100% Correct Answers | Latest Update What is the main reason that astronomers have devoted many years of effort to determining the rotation curve for the Milky Way galaxy - ANSWER : The rotation curve can be used to help us determine the distribution of the mass in the galaxy How does the diameter of the disk of the Milky Way compare to its thickness? - ANSWER : The diameter is about 100 times greater than its thickness The most common form...

White dwarfs: properties - Remaining cores of dead, low mass stars Electron degeneracy pressure supports them against gravity Slowly fade with time Sirius and its hot WD companion White dwarfs with same mass as Sun are about same size as Earth; slowly cooling Typical density 10^6 gram / cubic cm Higher mass white dwarfs are smaller Cannot be more massive than 1.4MSun, the Chandrasekhar limit WDs in binaries: nova, supernova Type I - Mass falls toward white dwarf from binary companion ...

TMS Astronomy Exam Questions Correctly Answered. Universe - CORRECT ANSWER All existing matter and space Galaxy - CORRECT ANSWER A collection of stars, dust, and gas bound together by gravity Spiral Shaped Galaxy - CORRECT ANSWER A galaxy that looks like a disc, or pin wheel Irregular Shaped Galaxy - CORRECT ANSWER A galaxy that does not have a defined shape Elliptical Shaped Galaxy - CORRECT ANSWER A galaxy shaped as an oval or egg-shaped Milky Way Galaxy - CORRECT ANSWER Th...

The disk of the galaxy is older than the halo. - F The density wave theory explains spurs and branches along the spiral arms. - F Giant molecular cloud complexes are located in spiral arms. - T Shapley found the distance to the center of the galaxy by studying the distance to open clusters - F The center of our galaxy is located in the direction of the constellation of Orion - F The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought. - T S...

Cygnus x-1 - correct answer A powerful x-ray source that is believed to be a black hole in our galaxy Virgo Cluster - correct answer Nearest large cluster of galaxies to our local group SBb - correct answer assignment given to a galaxy with moderately sized nuclear bulge & moderately wound arms starting from a bar through the central part of the galaxy That of an average city, about 10km - correct answer the diameter of a typical neutron star of 1 solar mass is predicted to be approxima...

Scientific notation is used in science because - it makes it easy to write big or small numbers. The average distance from Earth to the sun is - 1 AU The sun is - a star 1 AU from Earth. more than 100 times the diameter of Earth. A galaxy contains - gas, dust, and stars, and a lot of dark matter. The Milky Way Galaxy - contains about 100 billion stars. 2.9×107 is the same as - . 29 million It takes light 1.3 seconds to travel from the moon to Earth and 8 minutes to travel from the s...

1) The rotation curve of the Milky Way suggests that the majority of the mass of the Milky Way lies farther out than the Sun's orbit. A) True B) False 1) 2) Which of the following best describes the evolutionary track followed on the H-R diagram for the most massive stars (before the star undergoes a Type II supernova)? A) horizontally right, then forms a clockwise loop B) horizontally right, diagonally to lower left, then horizontally right C) diagonally to lower right, then vertical,...

How do we classify galaxies? - We classify galaxies based on if they are spiral, elipitical or irregular. The size is determined be the halo. What kind of stars do elliptical galaxies contain? - Ellipitcal galaxies have only older stars. There is no gas or dust to create new stars. What kind of stars do spiral galaxies contain? - Spiral Galaxies contain old and new stars and much gas and dust. How is the light from active galaxies different from light from normal galaxies? - Active ga...

The Cosmic Perspective, 7th Edition, Testbank | 2022 latest update 1 Copyright © 2014 Pearson Education, Inc. The Cosmic Perspective, 7e (Bennett et al.) Chapter 1 A Modern View of the Universe 1.1 Multiple-Choice Questions 1) What is the meaning of the word cosmos? A) the origin of Earth and life upon it B) the light from a distant astronomical object C) the Milky Way D) the sum total of all matter and energy, that is, everything within and between all galaxies E) the dark sky Ans...

the speed of light is about ___________________. - correct answer 1 ly/year Imagine that you travel the speed of light. Starting from earth, how long would it take you to travel to the center of the milky way galaxy - correct answer about 28,000 years the galactic center lies in the direction of which constellation - correct answer sagittarius we have evidence that a black hole lays in the very center of the Milky Way galaxy. what is the mass of this black hole - correct answer 4 millio...