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By in
on Oct 23, 2012

13mar30_430txt2

In the Southern Hemisphere, where it’s early autumn, the ecliptic hits the horizon at a steep angle in the wee hours before sunrise. Hence, Mercury rises before dawn at southerly latitudes.

In the Southern Hemisphere, where it's early autumn, the ecliptic hits the horizon at a steep angle in the wee hours before sunrise. Hence, Mercury rises before dawn at southerly latitudes.