Sagot :
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Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth's neighborhood
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•Telescope Technology and Observations Needed
Observations of NEOs are governed by the short time available to study them. Because they traverse near-Earth space very quickly and are intrinsically very faint, the window of opportunity for physical studies of most objects is measured in days to about a week at most. However, for some objects the observations can be planned. New technology need not necessarily be developed, but access to existing facilities (optical and infrared telescopes, radar facilities) or development of search and observational telescopes for more or less continuous use is desirable.