Asteroid Threat
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A new report from the National Research Council lays out options NASA could follow to detect more near-Earth objects (NEOs) – asteroids and comets that could pose a hazard if they cross Earth’s orbit. The report says the $4 million the U.S. spends annually to search for NEOs is insufficient to meet a congressionally mandated requirement to detect NEOs that could threaten Earth.
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An asteroid about the size of the one that levelled the forest in Tunguska, Siberia, a century ago flew past Earth on Monday - well within the Moon's orbit. The risk of a future impact with the object is not yet known.
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An asteroid hurtling towards Mars has a 1 in 28 chance of walloping the Red Planet on 30 January, according to the latest calculations. The rock's discovery just a couple of months before a possible impact begs the question of what would happen if it were instead headed for Earth.
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Observations by astronomers tracking near-Earth asteroids have raised a new object to the top of the Earth-threat list.
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A new survey revises down the likelihood of a massive asteroid hitting the Earth by 20-30%. We're only due to collide with rocks larger than one kilometre across roughly once every 600,000 years, it concludes.
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Fraser Cain wonders if the uncertainty surrounding impact predictions will prevent governments from taking the needed action to stop a real impact threat.
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An excellent discussion of the national security dimensions of the asteroid threat from a roundtable at the Marshall Institute. Transcript of discussion includes question and answer session.
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Astronomers debate the risks of a "doomsday" asteroid colliding with the earth.
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Researchers have determined, with the assistance of US military satellites, that the risk of Earth being struck by a killer asteroid is less likely than previously believed.
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Data from U.S. early warning satellites helps lower forecast for asteroids exploding in Earth's atmosphere.
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