To be clear, no known asteroid poses a threat to our planet for at least the next...
. But on March 1, four papers published in the journal Nature elaborated on how this type of mission — a"kinetic impactor" — could be effective at altering the trajectory of an asteroid.
A key element to this technique is early detection. Unlike the movie"Armageddon," in which the asteroid was discovered last-minute, crashing into an asteroid works best when that rock is years, preferably decades, from striking the Earth. “The results demonstrate how successful the kinetic impactor technique can be — paving the way for a bright future for planetary defense,” Jason Kalirai, civil space mission area executive at the Johns Hopkins Applied Physics Laboratory that led the DART investigation team, said in a news release.note that the DART spacecraft's ability to hit the asteroid autonomously is a critical first step toward making these planetary defense missions a reality., plus or minus 1 minute.
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