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Deflected Asteroids May Keep Coming Back
New Scientist ^ | 11-17-2007

Posted on 11/17/2007 2:07:34 PM PST by blam

Deflected asteroids may keep coming back

17 November 2007

What goes around comes around. Unfortunately, no such karma figures in plans to deflect asteroids on a collision course with Earth, a hearing of the US House Science and Technology Committee was told last week. One big whack will deflect an asteroid temporarily, but does not guarantee safety next time its orbit brings it close.

Asteroid researchers have long debated the merits of deflecting asteroids with a powerful blast such as a nuclear explosion. However, Rusty Schweickart, who heads an asteroid research group called the B612 Foundation, told the committee that the effects of powerful blasts are hard to predict, especially if Earth's gravitational pull acts on the object. An asteroid could pass through one of the "keyholes" that would nudge it back onto a collision course, so once diverted it might need to be steered past Earth to prevent this.

(Excerpt) Read more at space.newscientist.com ...


TOPICS: News/Current Events
KEYWORDS: asteroids; collision; deflected; earth
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1 posted on 11/17/2007 2:07:37 PM PST by blam
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To: blam

So, to make a long story short, we’re doomed!


2 posted on 11/17/2007 2:09:14 PM PST by neodad (USS Vincennes (CG-49) Freedom's Fortress)
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To: neodad

Better option - put motors on it, get it into Earth orbit, mine the heck out of it.


3 posted on 11/17/2007 2:10:01 PM PST by Spktyr (Overwhelmingly superior firepower and the willingness to use it is the only proven peace solution.)
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To: Spktyr

And when we’re done with it we can use mass drivers to send it into the sun.


4 posted on 11/17/2007 2:12:55 PM PST by cripplecreek (Only one consistent conservative in this race and his name is Hunter.)
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To: blam
Rusty Schweickart...no relation to FR's LS (Larry Schweikart).

Nudging the little varmints into a collision course with the sun ought to take care of them.

5 posted on 11/17/2007 2:14:00 PM PST by Verginius Rufus
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To: cripplecreek

Or use the hollowed out shell as either a space station or colony ship.


6 posted on 11/17/2007 2:15:15 PM PST by Spktyr (Overwhelmingly superior firepower and the willingness to use it is the only proven peace solution.)
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To: blam

You don’t have to be a scientist to realize that deflections are just that—deflected— and not permanently resolved problems.


7 posted on 11/17/2007 2:15:26 PM PST by Clara Lou (Thompson '08)
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To: Verginius Rufus

I would loose no sleep if we got the chance to study crater formation in real time, on Mars.


8 posted on 11/17/2007 2:15:51 PM PST by Fraxinus (My opinion worth what you paid.)
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To: blam

Maybe we should build a huge hyperspace button for the planet......

9 posted on 11/17/2007 2:17:45 PM PST by USNBandit (sarcasm engaged at all times)
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To: blam

Okay, Rusty, so it’s a colosal game of ping pong, but consider the alternative.


10 posted on 11/17/2007 2:19:22 PM PST by Savage Beast ("History is not just cruel. It is witty." ~Charles Krauthammer)
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To: Spktyr

True, they’re already in space so weight isn’t an issue. Thick enough bulkheads will solve a lot of the radiation problems.


11 posted on 11/17/2007 2:20:25 PM PST by cripplecreek (Only one consistent conservative in this race and his name is Hunter.)
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To: blam

Hell, this ain’t rocket science....Oh, wait, it is.... Never mind.

....Bob


12 posted on 11/17/2007 2:20:31 PM PST by Lokibob (Some people are like slinkys. Useless, but if you throw them down the stairs, you smile.)
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To: Clara Lou

It does put the problem off until the next orbit, which may be hundreds of years.

OH WAIT! What with global warming and all, that’s way beyond the time we destroy the earth ourselves.

Problem solved!


13 posted on 11/17/2007 2:20:52 PM PST by Balding_Eagle (If America falls, darkness will cover the face of the earth for a thousand years.)
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To: blam
especially if Earth's gravitational pull acts on the object.

If an object has mass, the Earth's gravitational pull acts on the object. There is no if about it. See Physics 101.

14 posted on 11/17/2007 2:24:12 PM PST by 17th Miss Regt
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To: neodad

“So, to make a long story short, we’re doomed!”

Now the only question is: global warming or asteroid?


15 posted on 11/17/2007 2:30:42 PM PST by txzman (Jer 23:29)
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To: 17th Miss Regt

“Context” is your friend...

The next sentence gives you the clue.... “... pass through one of the “keyholes” that would nudge it back onto a collision course, ...”

The idea being presented had nothing to do with “Physics 101” being left out... LOL!


16 posted on 11/17/2007 2:31:22 PM PST by Star Traveler
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To: blam
deflecting asteroids with a powerful blast such as a nuclear explosion.

I'm curious. How does one do this, deflect an asteroid with a nuclear explosion, I mean? To deflect something like an asteroid you need force. A nuclear explosion produces energy which isn't quite the same thing.

ML/NJ

17 posted on 11/17/2007 2:32:58 PM PST by ml/nj
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To: blam
What is the FREQUENCY we are expecting some of these asteroids to come back? If we are talking hundreds of years, it is "good enough for government". The future generations will be able to do likewise, implement a better solution, already dead or enslaved, or have left the planet.

If we are only postponing disaster 10 years, then other more permanent solutions should be investigated.

18 posted on 11/17/2007 2:35:50 PM PST by weegee (End the Bush-Bush-Bush-Clinton/Clinton-Clinton/Clinton-Bush-Bush-Clinton/Clinton Oligarchy 1980-2012)
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To: blam

If we could nudge them into usefull orbits we could use them as an inter planetary conveyor system. Drop a payload on the asteroid surface when it’s in our neighborhood and launch the payload off its surface when it gets into the vicinity of mars or wherever else we need to deliver to.


19 posted on 11/17/2007 2:37:38 PM PST by cripplecreek (Only one consistent conservative in this race and his name is Hunter.)
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To: blam
So, like, is the point that we cannot permanently solve the problem, therefore why try? Jeez Louise, that is the same argument against SDI.

Besides, we don't have to deflect them, simply delay them long enough for Iran to rotate into the correct position.

20 posted on 11/17/2007 2:42:37 PM PST by NonValueAdded (Fred Dalton Thompson for President)
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