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'Planetary defense is knowing what's out there and what could do harm to us.' Meet the scientist who helped build NASA's asteroid response plan
Lindley Johnson has been a pioneer in blueprinting warning and response scenarios to any potential impact of Earth by an ...
Earth 1, asteroids 0: The next generation of planetary defense takes shape at JPL
The NEO Surveyor fulfills a 2005 act of Congress ordering NASA to catalog 90% of near-Earth objects larger than 459 feet, which is roughly the size at which an asteroid could take out a city, or ...