Particles Collected by Hayabusa Give Absolute Age of Asteroid Itokawa

The cross section area of the particle collected from the asteroid Itokawa using Hayabusa spacecraft. (Credit: Osaka University)

OSAKA, Japan (Osaka University PR) — Understanding the origin and time evolution of near-Earth asteroids (NEAs) is an issue of scientific interest and practical importance because they are potentially hazardous to the Earth. However, when and how these NEAs were formed and what they suffered during their lifetime remain enigmas.