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Understanding

Knowing more on Mercury

Knowing more on Phobos

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The space adventure > Mariner III

MARINER MISSIONS

Credit : NASA

Opposite, the first image of Phobos and Mars sent by Mariner 9.

Credit : NASA/Mariner 10 project

The surface of Mercury as seen by Mariner 10 in 1974. The central crater (crater Degas) has a diameter of 45 km. Mercury's density is twice that of the moon, craters are generally smaller. The white streaks are materials ejected during the formation of an impact crater.