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Old 12-25-2010, 08:22 AM #1
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Default Can we destroy an asteroid with a high powered laser?

I was watching The Universe on National Geographic. If Apophis will strike on 2029, can they construct a laser powerful enough to maybe "Vaporize" the asteroid?


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Old 12-25-2010, 08:32 AM #2
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Default Re: Can we destroy an asteroid with a high powered laser?

depends how hard you throw your laser at the thing

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Old 12-25-2010, 05:30 PM #3
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Default Re: Can we destroy an asteroid with a high powered laser?

The answer is a big NO! It might be possible to use a high power laser to vaporize a spot on the surface. That would generate a thrust to change the orbit of the asteroid, and push it out of the earth's path.
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Old 12-25-2010, 06:03 PM #4
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Default Re: Can we destroy an asteroid with a high powered laser?

That's what missles are for.
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Old 12-25-2010, 06:18 PM #5
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Default Re: Can we destroy an asteroid with a high powered laser?

no one watched 2012? i'd be afraid of that first. and if you are one person on the ark builded, or on the only continent that survived, then get something else to worry about becuase that asteroid is nonsense:
Apophis (planeto´de) - Wikipedia
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Old 12-25-2010, 06:28 PM #6
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Default Re: Can we destroy an asteroid with a high powered laser?

Ya I am not to worried about it until April 12th 2029.
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Old 12-26-2010, 07:18 AM #7
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Default Re: Can we destroy an asteroid with a high powered laser?

If you've seen Macgyver, you know that lasers can apply "force" to your enemies.



Why not a silly asteroid?
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Old 12-26-2010, 07:23 AM #8
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Default Re: Can we destroy an asteroid with a high powered laser?

The appropriate thing to do is to mount rocket thrusters on it and push it out of orbit. Even nukes would only be useful to push it out of orbit as well, as you're not going to vaporize a quarter-km diameter chunk of rock with nukes or lasers.
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Old 12-26-2010, 02:55 PM #9
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Default Re: Can we destroy an asteroid with a high powered laser?

Well i think its possible to lase right through it, but i guess you need a laser of 100.000tW. (terrawatt)
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Old 12-26-2010, 05:40 PM #10
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Default Re: Can we destroy an asteroid with a high powered laser?

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The appropriate thing to do is to mount rocket thrusters on it and push it out of orbit. Even nukes would only be useful to push it out of orbit as well, as you're not going to vaporize a quarter-km diameter chunk of rock with nukes or lasers.
I agree with you, though considering the KE that such an asteroid would have leaves me thinking that we'll need bigger rockets.

IE KE=.5mv^2

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Old 12-26-2010, 10:05 PM #11
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Default Re: Can we destroy an asteroid with a high powered laser?

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Even nukes would only be useful to push it out of orbit as well, as you're not going to vaporize a quarter-km diameter chunk of rock with nukes or lasers.





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Old 12-26-2010, 10:18 PM #12
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Default Re: Can we destroy an asteroid with a high powered laser?

Yea like Hollywood never gets it wrong or exaggerates.
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Old 12-26-2010, 10:46 PM #13
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Default Re: Can we destroy an asteroid with a high powered laser?

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Well i think its possible to lase right through it, but i guess you need a laser of 100.000tW. (terrawatt)
Almost there...http://laserpointerforums.com/f45/un...ser-31485.html

And that was in '08.....I should go there tomorrow and just ask them, "Hey, how's the megaultrasuperepicspecialawesome laser going?" Then...."Can it pop a balloon? How about a gigantic rock balloon?"

apophis was once a 4 on the torino scale but was then downgraded to a one, then 0. Currently chances of impact are less than 0.1%.
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Old 12-27-2010, 07:36 AM #14
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Default Re: Can we destroy an asteroid with a high powered laser?

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Yea like Hollywood never gets it wrong or exaggerates.
I think it's hilarious seeing the amount of gravity they depict on the asteroid too.

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Too bad it only discharges that much energy for 30 femtoseconds, and takes another 10 seconds to recharge. Even if it could operate a full second, you can still get an order of magnitude more energy out of a 1MT nuclear blast.
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Old 12-27-2010, 08:53 AM #15
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Default Re: Can we destroy an asteroid with a high powered laser?

Yeah, you would probably do best to blow a 10MT nuke 50 miles from one side of the asteroid as that could push it at least a few degrees from it's path of impact. Just don't miss, otherwise you might turn a "maybe" impact into one that's guaranteed.
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Old 12-27-2010, 11:51 AM #16
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Default Re: Can we destroy an asteroid with a high powered laser?

@Bionic-Badger still, that was 2 years ago and even if it can only generate so much energy for that long, we do not have that many nukes, in 10 minutes though, we could shoot this 60 times. Mabye to date, it could have had another amplifier added for a power of 1000 terrawatts .
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