near-Earth asteroid


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near-Earth asteroid

(NEA) Any asteroid that has a chance of hitting our planet, specifically any member of the Apollo, Amor, and Aten groups. Although the annual probability of the Earth being struck by a large asteroid or comet is extremely small, the consequences of such a collision are so catastrophic that it was thought prudent in the USA to assess the nature of the threat and to be prepared to deal with it.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
In one option for the ARM, a spacecraft would rendezvous with a near-Earth asteroid and deploy a giant bag to capture the rock.
Thanks to the sky surveys by the Palomar Observatory and others, the number of detected near-Earth asteroids has surged from 100 in 1990 to over 400 in 1998, the discovery rate averaging close to 50 new bodies per year.
Frozen water on the moon (as well as in the cores of numerous near-Earth asteroids) may someday serve as a propellant or means of life support.
The inner moon, some 180 to 240 m (600 to 800 feet) across, takes roughly 7 to 8 hours to complete an orbit--the shortest orbital period for any of the 60 near-Earth asteroids known to have companions.
But even as the ARM mission closes out, research and development will continue in key areas, including solar electric propulsion and searches for near-Earth asteroids.
For ARM, a robotic spacecraft will capture a boulder from the surface of a near-Earth asteroid and move it into a stable orbit around the moon for exploration by astronauts, all in support of advancing the nation's journey to Mars.
Washington, Mar 5 ( ANI ): A near-earth asteroid is set to fly past Earth on March 11.
Slooh.com will broadcast the passing of the Near-Earth Asteroid 2000 EM26 as the Olympics took place in Sochi, Russia, CNet.com reported.
The intrepid asteroid explorer will rendezvous with near-Earth asteroid 1999 JU3 in 2018 and obtain samples from its surface before returning to Earth in 2020.
Slooh.com broadcast the passing of the Near-Earth Asteroid 2000 EM26 as the Olympics took place in Sochi, Russia, CNet.com reported.
NASA's Near-Earth Asteroid Tracking discovered the space rock on Boxing Day.