The Cosmic Perspective (8th Edition)
The Cosmic Perspective (8th Edition)
8th Edition
ISBN: 9780134059068
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 22, Problem 52EAP

(a)

To determine

The apparent brightness of the Sun in our sky.

(b)

To determine

The apparent brightness of our Sun if it is at a distance of 10 billion light years.

(c)

To determine

How many stars like the Sun would need to exist at a distance of 10 billion light years for their total apparent brightness to equal that of our Sun?

(d)

To determine

Compare answer to part c with estimate of the total number of stars in our observable universe from mathematical insight. Why night sky is much darker than day time sky. How much larger would the total number of stars need to be for night to be as bright as day?

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The Cosmic Perspective (8th Edition)

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