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See Mercury at its best in the night sky over the next 2 weeks

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Many astronomy guide books refer to Mercury as the most difficult of the naked-eye planets to see.

From March 5 through March 10 , Mercury will set at, or shortly after the end of evening twilight, more than 1 hour 30 minutes after sunset for mid-northern latitudes.

The most favorable elongations of Mercury are those when the planet rises or sets in a dark sky.

Mercury 's brightness will have dropped to magnitude +1.6 on the evening of March 15 .

In telescopes it will appear as a narrowing crescent phase only 16% illuminated.

Mercury experiences by far the greatest range of temperatures: nearly 900F on its day side; -300F (-184C) on its night side.

In old Roman legends, Mercury was the swift-footed messenger of the gods.