Asteroids Earth NASA
NASAs Near Earth Object Program was established in 1998 to coordinate NASA-sponsored efforts to detect track and characterize potentially hazardous asteroids and comets that could approach the Earth. Scientists continuously monitor Earth-crossing asteroids whose paths intersect Earths orbit and near-Earth asteroids that approach Earths orbital distance to within about 28 million miles 45 million kilometers and may pose an impact danger.
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By immediately tracking potentially hazardous near-Earth objects or PHAs we have more time to study potentially threatening situations.
. Radar is a valuable tool in detecting and monitoring potential impact hazards. NASA have warned huge asteroids could be heading for Earth totally undetected due to a blind spot in the sky. Astronomers funded by the US space agency have found objects heading towards us at nigh.
By reflecting transmitted signals off.
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