By creating a detailed map of Asteroid 433 Eros, a researcher from Cornell University has helped answer questions about its interior. Even though Eros is largely pockmarked from thousands of meteor strikes, it does have a few puzzling smooth parts. The smooth parts appear to have been caused by seismic waves that passed through the asteroid's interior and shook the ground smooth after it was hit by large impacts. This means that Eros' interior is cohesive enough to transmit these seismic waves.