Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Question
Chapter 15, Problem 16QAP
To determine
The chemical composition of Milky Way.
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If the sun is 4.6 billion years old, how many times has it orbited the Milky Way? (The sun is 8,300 pc from the cemetery of the Milky Way, and orbits the center at a speed of 225 km/s.)
______ times
The Sun is located in
a.
the center of the Milky Way Galaxy
b.
the bulge of the Milky Way Galaxy
c.
the halo of the Milky Way Galaxy
d.
the disk of the Milky Way Galaxy
The Virgo galaxy Cluster
Much smaller than the Local Group.
Contains 35 galaxies.
Is part of the Centaurus Supercluster.
Is held together by gravity.
Chapter 15 Solutions
Understanding Our Universe
Ch. 15.1 - Prob. 15.1CYUCh. 15.2 - Prob. 15.2CYUCh. 15.3 - Prob. 15.3CYUCh. 15.4 - Prob. 15.4CYUCh. 15 - Prob. 1QAPCh. 15 - Prob. 2QAPCh. 15 - Prob. 3QAPCh. 15 - Prob. 4QAPCh. 15 - Prob. 5QAPCh. 15 - Prob. 6QAP
Ch. 15 - Prob. 7QAPCh. 15 - Prob. 8QAPCh. 15 - Prob. 9QAPCh. 15 - Prob. 10QAPCh. 15 - Prob. 11QAPCh. 15 - Prob. 12QAPCh. 15 - Prob. 13QAPCh. 15 - Prob. 14QAPCh. 15 - Prob. 15QAPCh. 15 - Prob. 16QAPCh. 15 - Prob. 17QAPCh. 15 - Prob. 18QAPCh. 15 - Prob. 19QAPCh. 15 - Prob. 20QAPCh. 15 - Prob. 21QAPCh. 15 - Prob. 22QAPCh. 15 - Prob. 23QAPCh. 15 - Prob. 24QAPCh. 15 - Prob. 25QAPCh. 15 - Prob. 26QAPCh. 15 - Prob. 27QAPCh. 15 - Prob. 28QAPCh. 15 - Prob. 29QAPCh. 15 - Prob. 30QAPCh. 15 - Prob. 31QAPCh. 15 - Prob. 32QAPCh. 15 - Prob. 33QAPCh. 15 - Prob. 34QAPCh. 15 - Prob. 35QAPCh. 15 - Prob. 36QAPCh. 15 - Prob. 37QAPCh. 15 - Prob. 38QAPCh. 15 - Prob. 39QAPCh. 15 - Prob. 40QAPCh. 15 - Prob. 41QAPCh. 15 - Prob. 42QAPCh. 15 - Prob. 43QAPCh. 15 - Prob. 44QAPCh. 15 - Prob. 45QAP
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- Where might the gas and dust (if any) in an elliptical galaxy come from?arrow_forwardImagine that you have achieved immortality and you used it to travel outside of the Milky Way (you will be leaving today and you will be traveling with the speed of 1/10th of the speed of light). Describe how the Milky Way would look from the outside if you could watch it for the next 100 billion years.arrow_forwardDisk population stars have I. circular orbits in the plane of the galaxy II. randomly tipped, elliptical orbits III. old stars with low metal content IV. young stars with heavy metal content a. I and II b. I and III c. II and III d. II and IV e. I and IVarrow_forward
- The large black hole at the center of our galaxy is estimated to be a. 3.7 solar masses. b. 3.7 thousand solar masses. c. 3.7 million solar masses. d. 3.7 billion solar masses. e. 3.7 trillion solar masses.arrow_forwardIf a planet was located approximately 32 thousand light-years from the center of a galaxy and orbits that center once every 313 million years, how fast is the planet traveling around the galaxy in km/hr? If needed, use 3.0 × 108 m/s for the speed of light.arrow_forwardThe Tully-Fischer method relies on being able to relate the mass of a galaxy to its rotation velocity. Stars in the outer-most regions of the Milky Way galaxy, located at a distance of 50 kpc from the galactic centre, are observed to orbit at a speed vrot = 250 km s−1. Using Kepler’s 3rd Law, determine the mass in the Milky Way that lies interior to 50 kpc. Express your answer in units of the Solar mass.arrow_forward
- Suppose that the outer stars of a galaxy have an orbital velocity of 150 km/s. If the radius of the galaxy is 4.0 kpc (1??? = 3.1 × 1016 ??), what is the orbital period of the outer stars in years?arrow_forwardThe lower limit of the mass of the galaxy is a. 100 solar masses. b. 100,000 solar masses. c. 100 million solar masses. d. 100 billion solar masses. e. 100 trillion solar masses.arrow_forwardThe type of galaxy that consists almost entirely of old stars and is thus less blue (more yellow and reddish) than the other types is [Select] and our Milky Way Galaxy is a [Select] barred spiral elliptical irregular F3 [Select] जी 4 4») Q Search DII de in % 5 spiral all of these galaxy types consist mostly of very old stars A 2 LO F7 & 7 PrtScn 8 Home P Endarrow_forward
- Suppose that stars were born at random times over the last 1010 years. The rate of star formation is simply the number of stars divided by 1010 years. The fraction of stars with detected extrasolar planets is at least 11 %. The rate of star formation can be multiplied by this fraction to find the rate planet formation. How often (in years) does a planetary system form in our galaxy? Assume the Milky Way contains 3 × 1011 stars.arrow_forwardWhat is at the center of the Milky Way Galaxy?arrow_forwardThe orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy. a. I b. IV c. I & IV d. II & IV e. I & IIIarrow_forward
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