PLANETARY DEFENCE AT LEARMONTH SOLAR OBSERVA
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JPL Small-Body Database Browser
NASA has been warning about it…scientific papers have been written about it…geologists have seen its traces in rock strata and ice core samples…
Planetary Defense Recognition is an awareness, by a broad spectrum of the population that there is a threat. It may be infrequent, but when it occurs it is devastating. Surveillance of the near space environment is carried out by optical telescopes, aided by the new CCD imaging revolution.
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