When you getting to the orbit, you can end up mapping the whole planet at fairly high resolution. So we'll start having a maturing fundamental understanding of Mercury not only at surface but it's whole chemistry throughout all planet. From that we can unravel to some degree how it forms.
What other secrets are etched into Mercury's ancient surface? All ready, Messenger has sent back some curious clues.
Arriving in Mercury, there is a list of natural wonders to see, and even a dazzling light show.
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