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Posts Tagged "Sentinel"

Observations

Could Another Chelyabinsk-Scale Meteor Sneak Up on Us?

Asteroid orbit before impact

When a 17-meter asteroid barreled into Earth’s atmosphere over central Russia on February 15, releasing a powerful shock wave that injured more than 1,000 people, many observers wondered how such a momentous event could arrive unheralded. The fact is, the object that exploded in a fireball over Chelyabinsk, releasing hundreds of kilotons of energy, was [...]

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