A NASA Discovery mission to conduct the first orbital study of the innermost planet
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Fast Facts

Click on the links below to view facts about the planet Mercury.

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Check out the new scale model of the MESSENGER spacecraft!

 
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How Far from the Sun is Mercury?
How Long is a Year on Mercury?
How Fast Does Mercury Spin?
How Long is a Day on Mercury?
How Big is Mercury?
What is Mercury's Mass?
How Much Would I Weigh on Mercury?