21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 20, Problem 29QP

(a)

To determine

The Earth’s skies might appear if the Sun and Solar System were located near the center of the galaxy.

(b)

To determine

The Earth’s skies might appear if the Sun and Solar System were located near the center of a large globular cluster.

(c)

To determine

The Earth’s skies might appear if the Sun and Solar System were located near the center of a large, dense molecular cloud.

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Let us assume that our galaxy consists of 2.5 × 1011 stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution ? Take the diameter of the Milky Way to be 105 light year.
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