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This
image of Phobos, the inner and larger of the two moons of Mars, was taken
by the Mars Global Surveyor on August 19, 1998. This image is a close-up
of the far wall of the Stickney crater, 10 kilometers in diameter, that
is the largest crater on Phobos. This image shows lighter and darker streaks
going down the slopes. |
| This
image of Phobos, the inner and larger of the two moons of Mars, was taken
by the Mars Global Surveyor on August 19, 1998. This image is a close-up
of the far wall of the Stickney crater, 10 kilometers in diameter, that
is the largest crater on Phobos. This image shows lighter and darker streaks
going down the slopes. The presence of material of different brightness
on the far crater slopes and in some of the grooves shows that the satellite
is heterogeneous. |
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The
motion of debris down slopes is guided by gravity, which is only about 1/1000th
that of the Earth -- e.g., a 68-kilogram person would weigh only about 57
grams on Phobos. Phobos was observed by both the Mars Orbiter Camera (MOC)
and Thermal Emission Spectrometer (TES). This image is one of the highest
resolution images (4 meters per picture element or pixel) ever obtained
of the Martian satellite. |
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