Binocular Observing: Mercury

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Mercury is the smallest planet in the Solar System, and the closest planet to the Sun. Its tenuous atmosphere can’t trap the Sun’s heat, so days are fiery at over 400°C, and icy nights drop to nearly -200°C. If you were to stand on the line of shadow separating day and night, you would simultaneously burn and freeze to death.

From our perspective, Mercury is void of any interesting surface details.It’s a tough planet to spot with binoculars, but once you locate it, it’s quite unmistakable.

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