Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 23, Problem 57Q
To determine
The way to distinguish star images from unresolved images of remote galaxies on a CCD.
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Universe: Stars And Galaxies
Ch. 23 - Prob. 1QCh. 23 - Prob. 2QCh. 23 - Prob. 3QCh. 23 - Prob. 4QCh. 23 - Prob. 5QCh. 23 - Prob. 6QCh. 23 - Prob. 7QCh. 23 - Prob. 8QCh. 23 - Prob. 9QCh. 23 - Prob. 10Q
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Describe how you might use the color of a galaxy to determine something about what kinds of stars it contains.arrow_forwardWhy didnt astronomers before Shapley realize how large our Galaxy is?arrow_forwardWhat does it mean if one elliptical galaxy has broader spectrum lines than another elliptical galaxy?arrow_forward
- What are the two best ways to measure the distance to a distant, isolated spiral galaxy, and how would it be measured?arrow_forwardOne way to calculate the size and shape of the Galaxy is to estimate the distances to faint stars just from their observed apparent brightnesses and to note the distance at which stars are no longer observable. The first astronomers to try this experiment did not know that starlight is dimmed by interstellar dust. Their estimates of the size of the Galaxy were much too small. Explain why.arrow_forwardWhen comparing two isolated spiral galaxies that have the same apparent brightness, but rotate at different rates, what can you say about their relative luminosity?arrow_forward
- If we now realize dwarf ellipticals are the most common type of galaxy, why did they escape our notice for so long?arrow_forwardWhen astronomers make maps of the structure of the universe on the largest scales, how do they find the superclusters of galaxies to be arranged?arrow_forwardWhy does the disk of a spiral galaxy appear dark when viewed edge on?arrow_forward
- Using the information from Example 28.1, if galaxies are distributed homogeneously, how many times more of them would you expect to count on your second survey?arrow_forwardExplain where in a spiral galaxy you would expect to find globular clusters, molecular clouds, and atomic hydrogen.arrow_forwardGiven the ideas presented here about how galaxies form, would you expect to find a giant elliptical galaxy in the Local Group? Why or why not? Is there in fact a giant elliptical in the Local Group?arrow_forward
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