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NASA Asteroid Smash Pushed Entire System Orbit
10 Mar
Summary
- Spacecraft impact nudged entire asteroid system's solar orbit.
- Debris blast effectively doubled the momentum transfer from impact.
- Dimorphos is less dense, possibly formed from larger Didymos.
NASA's DART mission, which intentionally struck an asteroid in September 2022, has demonstrated a significant effect on the celestial bodies. Beyond altering Dimorphos's orbit around its larger partner, Didymos, the impact subtly shifted the entire asteroid pair's trajectory around the sun. This discovery, detailed in Science Advances, validates kinetic impactors as a viable planetary defense method.
The impact's effectiveness was amplified by ejected debris, which scientists estimate doubled the momentum transfer. This blast of material provided an additional push to the asteroid system. Researchers also noted distinct structural differences, suggesting Dimorphos, the smaller asteroid, is less dense and may have formed from Didymos.
