Stars and Galaxies (MindTap Course List)
Stars and Galaxies (MindTap Course List)
10th Edition
ISBN: 9781337399944
Author: Michael A. Seeds
Publisher: Cengage Learning
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Question
Chapter 1, Problem 3LL
To determine

The number of stars within 5 light years of sun.

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How far (in km) is 1 lightyear (ly) – the distance travelled by light in one Earth year? Use 299,732 km/s for the speed of light (c) and 1 year = 365 days. Show your solution and write your answer in both regular notation and scientific notation.
asap 1. Imagine that an object is moving around the Sun. What will be the orbital period of the object in Earth years if its orbit has a semi-major axis 1.587 AU?
Given the geometry shown in the picture, can you figure out where the planet is when it is moving the fastest and when it is moving the slowest?  Explain your reasoning as clearly as you can.
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