Understanding Our Universe
Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 2, Problem 1QAP
To determine

Whether the statement is true or false.

Expert Solution & Answer
Check Mark

Answer to Problem 1QAP

True

Explanation of Solution

Celestial sphere is defined as an imaginary sphere that has huge radius and it is concentric to Earth which means Earth lies at the centre of sphere. All the objects in sky are considered to be projected on the inner surface of this sphere such as stars and other objects

Celestial sphere is imaginary plane which is extended to the stars. It is an extension of physical surface of the Earth and Earth’s horizon in the celestial sphere.

Horizon is imaginary plane that extends from the observing location of observer on Earth out to the stars.

Conclusion:

Thus, the celestial sphere is the imaginary object and not the actual object in the sky. Hence, the given statement is true.

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