How do we know the structure of the earth?

J. Gerber provides a good summary answer in How do scientists determine the composition of the interior of Earth and other planets? at Scientific American.

Just as you can tell a lot about your trailer by how it tows and how it accelerates and stops; how you evaluate an older Airstream by prodding for floor rot and doing other things, planetary scientists use observations about how planets move and how they ring when hit and what they learn from direct tests to figure out the structure of the earth and other planets.

Comments are closed.