How do we weigh a world and map what lies inside?

How do orbit tracking, gravity variations, shape, rotation, and density constrain an interior that no camera can see?

Follow a radio signal from spacecraft to Earth, turn tiny motion changes into a gravity map, then compare interior models.

Spacecraft orbiting an asteroid while radio tracking and stylized gravity contours reveal mass distribution. — Vastward artistic reconstruction. Field contours, orbit, signal line, world, and ground antenna are composed to explain gravity science.

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