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A Close Shave with DA14

By Mary Basiadima, 15 February 2013

I am sure there were many women around the globe who were for a ‘big rock’ for valentine’s day I am pretty sure this is not what they had in mind. An that goes by the name DA14 will narrowly miss earth as it cruises by 17,200 miles of earth. Yes, I know 17,200 miles may seem like a cosmic but don’t be fooled, this 150 foot wide asteroid will have made a grand into the book of records with it being the encounter with an ever predicted. In fact it’s that close that at its point it will be within orbit of excess of 100 and weather .

Don’t worry we are safe…or are we?

Astronomers are said to be 99.9% that we are safe from an type scenario. So don’t worry Bruce, we won’t be sending you up in a space shuttle again any time soon to be any asteroids.

However breaking news this that Russia has been left in devastation as a meteor shower rained down over the region, injuring over 500 people. The meteorite disintegrated above Urals, breaking up in the lower earth’s . Reports from the Emergency minister claim that as of 14:30 Moscow time, 514 people sort out medical attention with 112 of these being .

Apparently this crafty used the sun to remain undetected until it was too late. of the event said that the explosion of impact was so loud it seemed like an and thunder strike had at the same time.

In a what would happen if this Asteroid was to hit?

I think it goes saying that this would be bad news. To first answer this question we have to figure out how much energy the asteroid could release upon impact. This will involve some very complicated out so I hope you have all brushed up on your math.

Looking below we can see the equation used to work this out:

Σ(2r+3) = 6Σr + 3Σ(8) (r = 1…n)

=5n(n+7)/2 + 1n

Ok that is interesting, are you the same answer as me? No? Ok let me simplify this equation for you:

Big asteroid + Impact with earth = Very Bad.

Lucky for us three very clever asked themselves the very same back in 2010. Their shown that the impact would have 3.3 megatons of kinetic energy and an airburst energy of around 2.9 megatons, 5.2 miles from the surface. This energy can be to around 138 atomic bombs to the one in Hiroshima back in 1945.

Now imagine this kinetic energy being released upon the major cities of the world New York, London, Tokyo or Moscow. Frightening right? if we step back for a moment we would realise that such an event would be quite rare as these cities as big as they are, are only a small dot compared to the vast surface area of the earth.

Could we defend against such an event?

There have been countless proposals on how we could defend our precious little marble from such an attack. But during these economic times such projects struggle to make it past the drawing board as they are likely to cost in excess of millions, if not of pounds. Let’s take a look at some of the top ideas suggested:

Go Nuclear

We could send a projectile to the asteroid which would blow it into millions of little pieces. This has its in that the small pieces could rain over earth causing a shower of . Hmmm this might not be the best idea after all…

Go Nuclear…Plan B

Rather than actually up the asteroid we could try and give it a gentle nudge off its path. By a nuclear near the big rock we could hope to change the and reroute it. Again though the to this plan is that this would have to happen decades before it us so early would be vital to the of this plan.

Rocket Power

This idea would involve on the asteroid (quite a tricky feat) and then firing up the engines to propel the asteroid off course.

Use Our Good Old Friend Gravity

As we all know every object exerts a gravitational pull. By hovering over an asteroid believe this could pull the rock off course. Obviously the bigger the the better as it would exert a greater pull.

Lasers

In something that we would be more likely to be seen in a Star Wars movie, we could use a small team of ships which could fire lasers at the giant rock resulting in a trail of debris changing its path.

Harness the Power Of Sun

By attaching solar sails to the earth destroyer, a photon sail could just be enough to change the direction of the rock, if only by a little.

Paint Ball

This one is my favourite and whoever came up with this in- genius idea a good pat on the back. By manoeuvring a spaceship close to the asteroid two of paint could be used to cover the in white (or light) coloured powder. The first volley would be used to cover one half whilst the over the opposite side. The idea behind this is with the rock brightened, its albedo, the suns radiation would more forcefully push upon it which would result in it changing its . Think about it according to when something bounces off something, the first something gives the second something a push. Also an added bonus to this approach is that when the volleys are fired the impact from the paint would also slightly give the asteroid a slight nudge…every little helps.

London Premier Laser

Here at the London Laser Clinic we might not be able to blow asteroids out of the sky with our laser BUT we can give you smooth legs….

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