Whose mission first mapped the gravity field of Mars in detail and revealed hidden differences beneath the surface?
Quick Answer
That was NASA's Mars Global Surveyor, launched in 1996. It produced detailed maps that helped reveal variations in Mars's crust and interior.
The Full Story
Mars Global Surveyor arrived at Mars in 1997 and operated for nearly a decade. Among its major achievements was detailed mapping of the planet's gravity field, which helped scientists infer differences in crustal thickness and interior structure. The mission also imaged the Martian surface with high resolution and made fundamental contributions to Mars science. It showed how orbital measurements can reveal features hidden far below the surface.
Key Facts
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Suggested video title for this topic:
"How do you see beneath Mars’s surface? A spacecraft measured its gravity."
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