near-Earth asteroid

(redirected from Asteroid impact)
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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.
References in periodicals archive ?
Yet this is only scratching the surface of the volcano, since the asteroid impact will only have excavated rocks buried a few tens of metres below the surface.
It involves two independent spacecraft: Nasa's Double Asteroid Redirection Test (DART), and ESA's Asteroid Impact Mission (AIM).
Researchers explored seven effects associated with asteroid impacts heat, pressure shock waves, flying debris, tsunamis, wind blasts, seismic shaking and crateringand estimated their lethality for varying sizes.
So Dr Tori joins Mike to look for evidence of the first ever asteroid impact crater in the UK, and one of the biggest known across the globe.
Seeds might have sustained ancestral birds through the nuclear winter that could have followed the asteroid impact.
ISLAMABAD -- The largest asteroid impact zone on Earth has been identified by scientists after two collision sites were discovered in central Australia.
BIG-NAME scientists including Brian Cox have called for more to be done to prevent a devastating asteroid impact.
He used physics, models, and knowledge about the formations in the Barberton greenstone belt, other earthquakes and other asteroid impact sites on Earth and the moon to calculate the strength and duration of the shaking that the asteroid produced.
Not all scientists agree, but getting it right is important because the shape of dinosaur diversity leading up to the asteroid impact may ultimately reveal new information about the nature of dinosaur extinction, and mass extinctions in general.
The topics include a model for tsumanis and poisonous gases generated by asteroid impact in the Black Sea, characteristic wounds of the 2004 tsumani, applying coastal forest in tsumani disaster mitigation, the response of coastal vegetation and the need for green belts along India's Tamil Nadu coast as demonstrated in 2004, the 2004 inundation and evidence for earlier events in Sri Lanka, and the generation and mathematical modeling of tsumanis.
C) to describe how scientists collected evidence of the single asteroid impact
Yucatan asteroid didn't wipe out dinosaurs, says study: A cataclysmic asteroid impact 65 million years ago may not have been the main cause of the mass extinction of the dinosaurs, according to evidence uncovered by geographers from Royal Holloway, University of London.