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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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To: RightWhale

Ion motors, eh? based on what I have read, they slowly increase their thrust (the current systems do anyway). So, the motors would have to be attached while the body is far, far out.


41 posted on 11/17/2007 3:16:46 PM PST by Army Air Corps (Four fried chickens and a coke)
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To: InABunkerUnderSF

Why not just teleport it then? :-)


42 posted on 11/17/2007 3:18:21 PM PST by Army Air Corps (Four fried chickens and a coke)
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To: Fraxinus

Or we could follow Ralph Kramden’s advice, “to the moon!” and have a better view of the crash.


43 posted on 11/17/2007 3:19:58 PM PST by Verginius Rufus
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To: cripplecreek
weight wouldn’t be an issue; but mass would be. Acceleration would be a bigger challenge than it is for less massive spacecraft. As for steering around obstacles on route — forgetaboutit!
44 posted on 11/17/2007 3:21:01 PM PST by USFRIENDINVICTORIA
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To: Spktyr
Or use the hollowed out shell as either a space station or colony ship.

Yeah, but how long until the people in it forget it's a ship. Then troublemakers will be saying, "...for the world is hollow, and I can touch the sky."
45 posted on 11/17/2007 3:23:38 PM PST by wolfpat (If you don't like the Patriot Act, you're really gonna hate Sharia Law.)
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To: blam

Asteroids are mostly made of coal. We need to figure out how to get the coal to land on Earth in nice piles.


46 posted on 11/17/2007 3:24:08 PM PST by Reeses (Leftism is powered by the evil force of envy.)
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To: GregoryFul

There is no atmosphere in space so there is nothing that conducts kinetic force to the object...a nuke unless buried in an offending asteroid would simply be an instant flash of intense light ...then nothing! The exposed asteroid might melt into vapor if it was small enough but only be singed on the exposed side if it was very large!


47 posted on 11/17/2007 3:30:07 PM PST by mdmathis6
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To: GregoryFul

There is no atmosphere in space so there is nothing that conducts kinetic force to the object...a nuke unless buried in an offending asteroid would simply be an instant flash of intense light ...then nothing! The exposed asteroid might melt into vapor if it was small enough but only be singed on the exposed side if it was very large!


48 posted on 11/17/2007 3:31:46 PM PST by mdmathis6
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To: blam

I had deflected asteroids once. Had to use lots of that Preparation cream to get rid of em. What’s the big deal?


49 posted on 11/17/2007 3:32:45 PM PST by GRRRRR (The Libtards are spoiling for a big fight!)
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To: blam

Seems to me that there are plenty of other objects in the solar system that we could aim it at. If you’re going to be altering its path anyway, might as well solve the problem permanently.


50 posted on 11/17/2007 3:33:46 PM PST by John Jorsett (scam never sleeps)
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To: blam

Orbital mechanics is a bitch, all right.


51 posted on 11/17/2007 3:33:59 PM PST by r9etb
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To: txzman
Now the only question is: global warming or asteroid?

Well, if asteroids are the problem, perhaps the solution lies in their opposite. In which case, there's somebody who can help:


52 posted on 11/17/2007 3:36:54 PM PST by r9etb
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To: blam

“TTTThhheeeyyy’’rrreee back!”


53 posted on 11/17/2007 3:48:40 PM PST by lilylangtree (Veni, Vidi, Vici)
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To: Savage Beast; blam; CholeraJoe
I saw that too: The ONLY able-to-be-done solution = blow up a nuke one side of an incoming spinning, oblong, irregular mass of rack that WILL OTHERWISE hit the earth - and, for at least one revolution, send it away from the earth in smaller chucks......

Every other “solution” involves intricate tricks of trying hook the asteroid, deflect it with nonexistent rockets, ion drives, nuke drives, solar sails, etc, etc, etc.

They pretend those are solutions - but NONE have been tested, nor sent into space on intercept missions.

NONE of those magic devices exist: NONE are designed, built, tested, rigged up, attached to missiles, or even of a SIZE that can be attached to rockets.
NOBODY has actually come up with a tested design to hook onto a spinning irregular mass only slightly smaller than a good sized hill EXACTLY on its center of gravity and on its axis of rotation and “pull” with some nonexistent mount, eyebolt, and pivot: all by remote control of course, and from a mission that far exceeds ANY previous manned flight.

But the same people who can’t pull a mountain in space away from its course denigrate through elaborate theories disposing of the residue of a simple H-bomb blast - that will have pulverized much/some/all of the original rock.

The problem is that these same research simply hate the idea of blowing nuclear bombs in space to protect the earth - so they are forced to come up with theorectical problems.

54 posted on 11/17/2007 3:51:33 PM PST by Robert A Cook PE (I can only donate monthly, but Hillary's ABBCNNBCBS continue to lie every day!)
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To: RightWhale; Army Air Corps
You’d have to mount the drive exactly on the axis of spin - collinear with that axis, or it would not drive the mountain to a different orbit - only start it tumbling on the same orbit.

have to build the drive motor and mount, get it on the supper-duper-space shuttle - we have none that get to the moon, much less past Mars on an intercept, get to/past the asteroid on a path fast enough to allow slowing down/speeding up to intercept, then match orbits and “park” close enough to send manned suits down to the rock to mount the drive.....

All of the above makes going to the moon easy: since we can’t even get back to the moon right, even harder with today’s NASA attitudes and abilities.

55 posted on 11/17/2007 3:59:48 PM PST by Robert A Cook PE (I can only donate monthly, but Hillary's ABBCNNBCBS continue to lie every day!)
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To: neodad

No no no....

spel it more like this:

Dooooooooooooooooomed

Extra points for bold & italicized


56 posted on 11/17/2007 4:00:04 PM PST by ChetNavVet (Build It, and they will GO!)
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To: Army Air Corps

Yes, it will take some time, so we better start today.


57 posted on 11/17/2007 4:02:13 PM PST by RightWhale (anti-razors are pro-life)
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To: GregoryFul
Any blast causes damage by extreme overpressure on exposed objects. A pulse of force

You only have an exteme overpressure where you have an atmosphere, In space you only have thermal and radiation to work with, you'd only have force if you could get a warhead into the surface.

58 posted on 11/17/2007 4:05:55 PM PST by Vinnie_Vidi_Vici
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To: Robert A. Cook, PE

Nobody was even thinking of NASA. The Treaty would be repealed, the asteroid would be claimed by a private company with the stipulation that it be removed from danger to earth and the company would mine it for whatever it is worth.


59 posted on 11/17/2007 4:06:45 PM PST by RightWhale (anti-razors are pro-life)
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To: neodad

Put "The Negotiator" on the case!

60 posted on 11/17/2007 4:07:02 PM PST by SlowBoat407 (Free commerce is the only just way to redistribute wealth.)
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