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Astronomy

Characterizing the Surface Composition of Asteroids through Spectroscopy

Quick fact

Asteroids are identified as C-type (carbon-rich) or S-type (silicate-rich) primarily by the shapes of their light spectra, which show distinct absorption bands caused by iron in minerals.

Why this is interesting

We can't land on almost every asteroid, yet we know what they are made of. How do we do it?