On Thursday an observer in Maryland observes a moon in the shape of a crescent ,

Question

On Thursday an observer in Maryland observes a moon in the shape of a crescent , illuminated on the right hand side, near the horizon in the western sky. Use a physical model of the sun, moon and earth to answer the following questions. 1. Determine the approximate time of this observation. Explain how you determined your answer. 2. Two weeks later the observer looks at the moon and sees it near the horizon again. a. What shape moon did the observer see? Explain your reasoning. b. What time was this second observation made? Explain your reasoning.

Explanation / Answer

refer : http://www.dudleyobservatory.org/InTheSky/Skywatch_current.htm

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