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Name: Lynne
Status: educator
Grade: 9-12
Location: IL
Country: N/A
Date: 5/31/2005


Question:
In the Northern Hemisphere, the first quarter of the moon appears with the lit side to the right of the observer. How does this appear to an observer in the Southern Hemisphere on the same night? Also, are the poles, craters, and mare "flipped" top-bottom? How would this appear to someone on the equator on the same night?


Replies:
In the Southern Hemisphere, the first-quarter Moon appears to lit from the left. This is because a person "down under" is essentially standing on his/her head relative to a person in the Northern Hemisphere.

The Moon, its features, along with the entire Universe, appear upside-down from the Southern Hemisphere. The further south, the more upside-down it appears.

At the equator, the first-quarter Moon rises lit half first (as is everywhere) but moves almost directly overhead 6 hours later, then sets lit half first.

HOWARD BARNES,
Auckland,
New Zealand. (37 degrees South)



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