| 21. | Also if you make your impactor very fast ( and small ) it would bury itself underground.
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| 22. | So in theory at least, the hypothetical impactor was a blockbuster about half the diameter of Earth.
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| 23. | The rocket-propelled Impactor will separate from a fly-by craft and crash into Tempel 1.
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| 24. | In the absence of atmosphere, the impact process begins when the impactor first touches the target surface.
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| 25. | The European Union's NEOShield-2 Mission is also primarily studying the Kinetic Impactor mitigation method.
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| 26. | Hamacher's result is dependent on the impactor's density, size, and impact velocity.
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| 27. | They estimated the impact occurred about 3.26 billion years ago and that the impactor was approximately wide.
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| 28. | Another possibility is that the impactor may have punched through the bright surface to reveal a dark layer beneath.
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| 29. | Soil samples retrieved from the Aitken Crater may hold chemical signatures that would help identify the impactor, said Black.
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| 30. | As this shock wave expands, it decelerates and compresses the impactor, and it accelerates and compresses the target.
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