Sharmila is a Seattle-based science journalist. She found her love for astronomy in Carl Sagan's The Pale Blue Dot and has been hooked ever since. She holds an MA in Journalism from Northeastern University and has been a contributing writer for Astronomy Magazine since 2017. Follow her on Twitter at @Sharmilakg.
and brought back to Earth in 2010. By analyzing the dust particles, Jourdan's team found that Itokawa is almost as old as the solar system itself. In the new paper, the team explains how Itokawa has survived countless asteroid collisions over 4.2 billion long years. that a catastrophic collision destroyed Itokawa's parent body, this is the first time that Itokawa's precise age and resilience have been directly studied.
The team found that the dust particles were mostly pristine, suggesting that they were excavated from deep within the parent asteroid, likely when it broke apart during the catastrophic collision. The scientists concluded that Itokawa is extremely resilient to collisions, thanks to the asteroid's highly porous nature.
When asteroids impact Itokawa, large cavities or pores between these boulders absorb much of the resulting energy surge, protecting the asteroid's structure from fractures. In this way, the pores help rubble piles like Itokawa survive asteroid collisions for at least 10 times longer than conventional, single-body asteroids, also known as monoliths, the researchers found.
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