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TOPIC: Avoiding Collision / Destroying NEO


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RE: Avoiding Collision / Destroying NEO
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NASA Office to Coordinate Asteroid Detection, Hazard Mitigation

NASA has formalized its ongoing program for detecting and tracking near-Earth objects (NEOs) as the Planetary Defense Coordination Office (PDCO). The office remains within NASA's Planetary Science Division, in the agency's Science Mission Directorate in Washington. The office will be responsible for supervision of all NASA-funded projects to find and characterize asteroids and comets that pass near Earth's orbit around the sun. It will also take a leading role in coordinating interagency and intergovernmental efforts in response to any potential impact threats.
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Don't fear apocalyptic asteroids: you're safer than you think

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Threat of space objects demands international coordination, UN team says

In the wake of a meteor impact in Russia that shattered windows over a wide area, injuring hundreds of people and terrifying thousands, a United Nations team today called for international cooperation to face the threat of near space objects.
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US-European asteroid deflection mission
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A space rock several hundred metres across is heading towards our planet and the last-ditch attempt to avert a disaster - an untested mission to deflect it - fails. This fictional scene of films and novels could well be a reality one day. But what can space agencies do to ensure it works?
ESA is appealing for research ideas to help guide the development of a US-European asteroid deflection mission now under study.

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Russia may build rocket to destroy Earth-threatening asteroids

Russia could start building a space rocket capable of destroying asteroids threatening the Earth, chief of rocket and space corporation Energia said Friday.
To change the orbit of a small planet of Apophis' size, a 70-ton rocket was needed to "tow" an asteroid away from Earth or to destroy it with a thermonuclear blast

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Scots scientists on mission to save planet from rogue asteroids

Scientists are to launch a multi-million-pound project aimed at finding ways of stopping an asteroid impact from destroying the planet. Experts at the University of Strathclyde will investigate the use of laser beams, giant robotic arms or nets to deflect asteroids and deal with space junk - the increasing amount of debris from old rockets and satellites left floating around.
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Doomsday asteroid
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'Nuke won't save us from asteroid'

When Bruce Willis used a nuclear bomb to save Earth from a giant asteroid in the movie Armageddon, the scenario had little science and a lot of fiction, physicists have said.
Willis' nuke would have had as much impact on the rock as a cheap firecracker and was used so late that the planet would have been doomed anyway, they said.

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Bombshell over 'doomsday asteroid'

A team of physics students calculated it would have to be a billion times more powerful than the largest nuclear device ever detonated on Earth, the Soviet Union's 50-megaton hydrogen bomb "Big Ivan".
The asteroid would also have to be detected much earlier than the one in the film to stand any chance of splitting it in time.

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Yarkovsky Effect
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 OSIRIS-REx Scientists Measure Yarkovsky Effect

Scientists with the UA-led asteroid sample return mission, OSIRIS-REx, have measured the mass and orbit of their destination asteroid, 1999 RQ36, with great accuracy.
Scientists with the University of Arizona-led asteroid sample return mission OSIRIS-REx have measured the orbit of their destination asteroid, 1999 RQ36, with such accuracy they were able to directly determine the drift resulting from a subtle but important force called the Yarkovsky effect - the slight push created when the asteroid absorbs sunlight and re-emits that energy as heat.

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RE: Avoiding Collision / Destroying NEO
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Martin Griffiths: There's no point worrying about asteroid armageddon

The probability of a major impact occurring in a politically relevant timescale (say, during our lifetimes) is extremely low, but not outside the bounds of possibility.
The impact hazard is, therefore, a terrifying prospect that remains the ultimate high-consequence, low-probability hazard. Predicting Armageddon is more than producing an array of facts and figures, but involves concerns relating to recent impacts.

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Phil Plait: How to defend Earth from asteroids

What's six miles wide and can end civilization in an instant? An asteroid - and there are lots of them out there. With humour and great visuals, Phil Plait enthrals the TEDxBoulder audience with all the ways asteroids can kill, and what we must do to avoid them.



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