Universe
Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars d…
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths…
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Chapter 22, Problem 43Q
To determine

To explain: The method to form a supermassive black hole at the galaxy’s center.

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Is the NGC 4440 galaxy observable from the Calar Alto Observatory?
Observations of the central region of the galaxy M87 indicate that stars which are 60 light years from the centre are orbiting the central supermassive black hole at speeds of 730 kms‑1.  Estimate the mass of the black hole, in solar masses. (You can assume circular motion.
Astronomers estimate the mass of the stars in a certain galaxy to be about 3.040 kg, and the total mass of this galaxy to be about 1.241 kg. The amount of the galaxy's mass is made up of dark matter is percent

Chapter 22 Solutions

Universe

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