Other scientists have shown that sun spot activity can be measured in periods of time that last about eleven years.
VOA: special.2009.09.29
When it was almost time for the sun to rise, she quietly left her house and hurried through the forest.
VOA: special.2010.04.03
The time was near the middle of the day and the sun was shining full upon me.
VOA: special.2010.07.10
During the day, the sun provided information about the time on a ship, and its direction.
VOA: special.2010.07.14
The day was very hot, and Taylor stood for a long time in the burning sun.
VOA: special.2009.04.09
The art slowly disappears because of the effects of time, sun and rain.
VOA: special.2009.04.08
At that time, people prayed to Horus, the god of the Sun.
VOA: special.2009.03.22
A navigator can know the latitude of his ship by observing the location of stars, where the sun rises in the morning and sets in the evening, and what time of year it is.
VOA: special.2010.07.14
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