The Cosmic Perspective (9th Edition)
The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 15, Problem 52EAP

a

To determine

The apparent brightness measured from the Sun if we are located at half earth’s distance from the Sun.

b

To determine

The apparent brightness measured from the Sun if we are located at two times earth’s distance from the Sun.

c

To determine

The apparent brightness measured from the Sun if we are located at five times earth’s distance from the Sun.

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Use the circumference and speed to figure out how long the Sun takes to go once around the Galaxy (the Sun's period, sometimes called the "galactic year.") Give your answer in Earth years. Be careful with your units.
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