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Mercury is visible in the sky at a height a = 13◦ above the horizon. What is the air mass in front of it at that time ? Why is it difficult to detect Mercury in a small air mass?

The Solar System

10th Edition

ISBN:9781337672252

Author:The Solar System

Publisher:The Solar System

Chapter12: The Moon And Mercury: Comapring Airless Worlds

Section: Chapter Questions

Problem 18RQ

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Mercury is visible in the sky at a height a = 13◦ above the horizon. What is the air mass in front of it at that time ? Why is it difficult to detect Mercury in a small air mass?

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