Lasers might be the answer to stopping asteroids or comets from destroying earth.

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Profile Bob DeWoody
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Message 1771491 - Posted: 14 Mar 2016, 4:07:24 UTC

Inside Science) -- Lasers mounted on robot spacecraft or giant satellites could deflect asteroids away from Earth, suggest new orbital simulations exploring this defense strategy.

An impact from a comet or asteroid about 10 kilometers wide likely caused the most recent and familiar mass extinction that ended the Age of Dinosaurs about 65 million years ago. Such giant impacts are rare, but smaller strikes can still wreak major havoc. Full article here.
https://www.insidescience.org/content/lasers-could-one-day-stop-asteroids-striking-earth/3606
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Message 1771586 - Posted: 14 Mar 2016, 15:47:38 UTC - in response to Message 1771491.  

"Lasers can be used to propel small probes to relativistic speeds, in what may be the only feasible way to get to the nearest stars," Lubin said.


That part is intriguing.
The mind is a weird and mysterious place
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Message 1771854 - Posted: 16 Mar 2016, 9:29:56 UTC

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Message 1771864 - Posted: 16 Mar 2016, 10:31:57 UTC - in response to Message 1771854.  

where does the massive amounts of energy come from to power the Laser ??
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Message 1771896 - Posted: 16 Mar 2016, 14:29:29 UTC - in response to Message 1771864.  

where does the massive amounts of energy come from to power the Laser ??

That always seems to be the common problem with many futuristic concepts. It can be done but only with massive amounts of power that in the foreseeable future can't be achieved.
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Message 1774896 - Posted: 29 Mar 2016, 6:04:50 UTC - in response to Message 1771864.  

where does the massive amounts of energy come from to power the Laser ??

James Bond to the rescue:
https://www.youtube.com/watch?v=xt_Kn4DggPg
;)


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Message 1774921 - Posted: 29 Mar 2016, 9:02:46 UTC - in response to Message 1771896.  

where does the massive amounts of energy come from to power the Laser ??

That always seems to be the common problem with many futuristic concepts. It can be done but only with massive amounts of power that in the foreseeable future can't be achieved.


Nuclear fusion would be a solution..
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Message 1774926 - Posted: 29 Mar 2016, 10:04:11 UTC

First we got to find them before we can try moving them

A few nukes will nudge any big ones away

I'm shore the U.S and China , Russia have more than enough to do the job

And if not no Laser is gona do diddly squat to any comet or meteor we can't use nukes to nudge it away with .
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Message 1775233 - Posted: 31 Mar 2016, 9:26:44 UTC - in response to Message 1774926.  
Last modified: 31 Mar 2016, 9:27:46 UTC

First we got to find them before we can try moving them

A few nukes will nudge any big ones away

I'm shore the U.S and China , Russia have more than enough to do the job

And if not no Laser is gona do diddly squat to any comet or meteor we can't use nukes to nudge it away with .

the MOST stupid idea is to nuke it:
http://www.dailymail.co.uk/sciencetech/article-3135279/Nasa-use-NUKES-defend-Earth-asteroids-Agency-teams-nuclear-experts-develop-space-bombs.html

Much wiser idea is to use laser!
Why?
Vaporizing one part of comet will make geyser of material...so it's just like having a rocket engine nudge from 1 side of comet!

& did I mention you don't have to go billion km to do it?! Just settle the laser somewhere in orbit or Lagrange point...
;)


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Message 1777596 - Posted: 9 Apr 2016, 21:02:20 UTC - in response to Message 1775233.  

First we got to find them before we can try moving them

A few nukes will nudge any big ones away

I'm shore the U.S and China , Russia have more than enough to do the job

And if not no Laser is gona do diddly squat to any comet or meteor we can't use nukes to nudge it away with .

the MOST stupid idea is to nuke it:
http://www.dailymail.co.uk/sciencetech/article-3135279/Nasa-use-NUKES-defend-Earth-asteroids-Agency-teams-nuclear-experts-develop-space-bombs.html

Much wiser idea is to use laser!
Why?
Vaporizing one part of comet will make geyser of material...so it's just like having a rocket engine nudge from 1 side of comet!

& did I mention you don't have to go billion km to do it?! Just settle the laser somewhere in orbit or Lagrange point...
;)

& also, it gets complicated...'cause in reaches beyond Earth, some Asteroids which don't get enough sunlight will be solid & cold...& you can use lasers which we have for drilling objects, heating them to produce jets of hot substance (whatever they are made of, 'cause it gets weird from one Asteroid to another)...

but what if you need to cool it down?!
why cool it down?!
well it come Asteroid gets a tail from movement to the Sun, if you cool it on one side -> other side will propel it sideways...making it shift orbit & miss Earth...
how to do that?
also, lasers:
http://www.popularmechanics.com/science/energy/a20217/laser-cooling-explainer-video/
;)


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Message 1781567 - Posted: 23 Apr 2016, 6:43:11 UTC

ufos zap them for us, or else we would have been blown many times over long ago.

don't believe me? check the records of rocks that just go missing.
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Message boards : Science (non-SETI) : Lasers might be the answer to stopping asteroids or comets from destroying earth.


 
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