How do scientists know what the core of the Earth is made of, even though we’ve never drilled anywhere near that deep?

Question

How do scientists know what the core of the Earth is made of, even though we’ve never drilled anywhere near that deep?

In: Planetary Science

Answer 1

By analyzing seismic data and electromagnetic fields. These are, of course, our best *predictions* on its material. We don’t have any direct samples that we’ve drilled out. But we have a lot of data, and know a lot about iron, to predict/know the core is made up of mostly iron.