Military Review

Nuclear weapons do not guarantee the salvation of the Earth from asteroids

The fall of an asteroid on Earth is one of the basic scenarios of the Apocalypse used in science fiction. To prevent fantasies from becoming reality, mankind prepared to protect itself against such a threat in advance, with some methods of protection already worked out in practice. Interestingly, the approaches of scientists from the United States and the Russian Federation in this matter have their own differences.

Today, 8 March 2016, at a distance of about 22 000 kilometers from Earth (14 000 kilometers below the orbit of geostationary satellites), 2013 TX68 asteroid with a diameter from 25 to 50 meters will pass. He has a unsteady, poorly predictable orbit. Subsequently, he will approach the Earth in 2017, and then in 2046 and 2097. The probability that this asteroid will fall to Earth is vanishingly small, but if this happens, the blast wave will be twice as powerful as the one that the Chelyabinsk meteorite produced in 2013 year.

So, 2013 TX68 is not particularly dangerous, but the asteroid threat to our planet with this relatively small “cobblestone” is not exhausted. In 1998, the US Congress instructed NASA to locate all nearby asteroids that are as large as one kilometer across and capable of threatening Earth. According to the classification of NASA, all small bodies fall into the “nearby” category, including comets that approach the Sun at a distance equal to at least 1 / 3 astronomical unit (AU). Recall that A.e. - This is the distance from Earth to the Sun, 150 millions of kilometers. In other words, in order for the “visitor” not to cause concern to earthlings, the distance between it and the solar orbit of our planet must be no less than 50 million kilometers.

By the year 2008, NASA as a whole had fulfilled this assignment, finding 980 similar flying debris. In 95%, the trajectories were precisely defined. None of these asteroids poses a threat in the foreseeable future. But at the same time, NASA, based on the results of observations obtained using the WISE space telescope, concluded that at least 4700 asteroids with a size of at least 100 meters pass by our planet. Scientists were able to find only 30% of them. And, alas, astronomers were able to detect only 1% of the number of 40-meter asteroids, periodically "walking" near the Earth.

In total, as scientists believe, in the Solar System they "run hither" to 1 a million asteroids located close to Earth, of which only 9600 were reliably detected. If the “cobblestone” size 100 – 150 meters passes at a distance of 0,05 a.e. from our planet (which is approximately 20 of the Earth-Moon distances, that is, 7,5 of millions of kilometers), according to NASA classification, it automatically falls into the category of “potentially dangerous objects”. Those of the American Aerospace Agency currently has about 1600 units.

How big is the danger

The likelihood of the fall of a large celestial "wreck" on the Earth is very small. It is believed that asteroids up to 30 meters across should burn in dense layers of the atmosphere on the way to the surface of the planet or at least collapse into small fragments.

Of course, much will depend on the material from which the space rogue is "made". If this is a “snowball” (a fragment of a comet consisting of ice interspersed with stones, soil, iron), then even with a large mass and size it will most likely “slam” like a Tungus meteorite somewhere high in the air. But if the meteorite consists of stones, iron or iron-stone mixture, then even with a smaller size and mass than the "snow", it will be much more likely to reach the Earth.

As for the celestial bodies across to 50 meters, they are believed by scientists to “visit” our planet no more than once in 700 – 800 years, and if we talk about 100-meter uninvited “guests”, then the frequency of “visits” already from 3000 years and more. However, the 100-meter fragment is guaranteed to sign a sentence to a metropolis like New York, Moscow or Tokyo. Fragments as large as 1 kilometers (guaranteed regional catastrophe, approaching global) and more fall to Earth not more than once every few million years, and giants 5 more than a kilometer and more once every few tens of millions of years.

Good news in this sense, said the Internet resource Scientists from universities in Hawaii and Helsinki, observing asteroids for a long time and estimating their number, came to an interesting and comforting conclusion for earthlings: celestial "debris" that spend enough time close to the Sun (at a distance of at least 10 solar diameters) will be destroyed by our luminary.

True, relatively recently, scientists have started talking about the danger posed by the so-called "centaurs" - giant comets, the size of which comes across to 100 kilometers. They cross the orbits of Jupiter, Saturn, Uranus and Neptune, have extremely unpredictable trajectories and can be directed to our planet by the gravitational field of one of these giant planets.

Forewarned is forearmed

Mankind already has technologies of protection against asteroid-comet hazard. But they will be effective only if a celestial fragment threatening the Earth is detected in advance.

At NASA, there is a “Search Program for Nearby Objects to Earth” (it is also called Spaceguard, which translates as “space guard”), which involves all space surveillance tools that are at the agency’s disposal. And in 2013, the Indian launch vehicle PSLV launched the first space telescope developed and built in Canada into near-earth polar orbit, whose mission is to control space. It was named NEOSSat - Near-Earth Object Surveillance Satellite, which translates as "Satellite tracking for objects nearby the Earth." In the 2016 – 2017 years, it is expected that another cosmic “eye” called Sentinel, created by the US-based non-governmental organization В612, will be launched into orbit.

Works in the field of space monitoring and Russia. Almost immediately after the fall of the Chelyabinsk meteorite in February 2013, employees of the Institute of Astronomy of the Russian Academy of Sciences proposed to create a “Russian system for countering space threats. This system would represent only a complex of space observation tools. Its declared value amounted to 58 billion rubles.

And recently it became known that the Central Scientific Research Institute of Mechanical Engineering (TsNIIMash) plans to create a center for warning about space threats in terms of asteroid-comet hazard within the framework of the new Federal Space Program before 2025. The concept of the Nebosvod-S complex suggests placing two spacecraft of observation in geostationary orbit and two more in the orbit of the Earth’s orbit around the Sun.

According to the experts of TsNIIMash, these devices will be able to become a “space barrier” through which practically no dangerous asteroid measuring several tens of meters will pass unnoticed. “This concept has no analogues and can become most effective for detecting dangerous celestial bodies with a lead time of up to 30 days or more before they enter the Earth’s atmosphere,” the press service of TsNIIMash noted.

According to a representative of this service, the institute participated in 2012 – 2015 in the international NEOShield project. As part of the project, Russia was asked to develop a system for rejecting asteroids that could threaten the Earth, using nuclear explosions in space. It was planned in this area and cooperation between Russia and the United States. 16 September 2013 in Vienna, Rosatom CEO Sergey Kiriyenko and US Secretary of Energy Ernst Moniz signed an agreement between the Russian Federation and the United States on cooperation in research and development in the nuclear and energy sectors, which created prerequisites for interaction between the two countries in the fight against asteroid danger. Unfortunately, the sharp aggravation of Russian-American relations, which began in 2014, actually put an end to this interaction.

Push away or blow up

Available to mankind technology provides two basic ways to protect against asteroids. The first can be used if the danger is detected in advance. The task is to send a spacecraft (SC) to the heavenly fragment, which will be fixed on its surface, turn on the engines and lead the “visitor” away from the trajectory leading him to collision with the Earth. Conceptually, this method has already been tested three times in practice.

In 2001, the American spacecraft "Shoemaker" landed on the asteroid Eros, and in 2005, the Japanese Hayabus probe not only sank to the surface of the Iterok asteroid, but also took samples of its substance, after which it returned safely to Earth in June 2010. The European spacecraft Fila, which in November 2014 of the year landed on the comet 67R Churyumov-Gerasimenko, continued the baton. Imagine now that instead of these spacecraft, tugs would be sent to these celestial bodies, the purpose of which would not be to study these objects, but to change the trajectory of their movement. Then all they had to do was to hold on to an asteroid or comet stronger and turn on their propulsion systems.

But what to do in a situation if a dangerous celestial body is discovered too late? One way remains - to blow up. This method has also been tested in practice. In 2005, NASA successfully rammed Comet 9P / Tempel using the Penetrating Spacecraft to conduct a spectral analysis of the cometary substance. Suppose now that instead of a ram a nuclear warhead would be used. This is exactly what Russian scientists are proposing to do, striking the upgraded Aprofis asteroid, which should approach the Earth in 2036. By the way, in 2010, Roscosmos had already planned to use Apophis as a testing ground for a spacecraft tug that was supposed to take the cobblestone aside, but these plans remained unfulfilled.

There is, however, a circumstance that gives specialists grounds to show skepticism about the use of a nuclear charge to destroy an asteroid. This is the absence of such an important damaging factor of a nuclear explosion as an air wave, which markedly reduces the effectiveness of the use of an atomic bomb for an asteroid / comet.

To prevent the nuclear charge from losing its damaging power, the experts decided to use a double strike. The Hypervelocity Asteroid Intercept Vehicle (HAIV), currently being developed at NASA, will beat the Hypervelocity Asteroid Interceptor. And this spacecraft will do this in the following way: first it will reach the "finish line" leading to the asteroid. After that, something like a battering ram separates from the main spacecraft, which will strike the first strike on the asteroid. A crater is formed on the “cobblestone”, into which the main spacecraft with a nuclear charge “leaps”. Thus, thanks to the crater, an explosion will occur not on the surface, but already inside the asteroid. Calculations show that the 300-kiloton bomb, exploded only three meters deep under the surface of a solid, increases its destructive capacity by at least 20 times, thus turning into a 6 megaton nuclear charge.

NASA has already awarded grants to several US universities to develop a prototype of such an "interceptor".

The main American "guru" in the matter of combating asteroid danger with the help of nuclear weapons is a physicist and developer of nuclear weapons at the Livermore National Laboratory, David Dearborn. Currently, he and his colleagues are engaged in bringing the W-87 warheads on high alert. Its power is 375 kilotons. This is about one third of the power of the most destructive warhead currently in service with the US, but 29 is more powerful than the bomb that fell on Hiroshima.

NASA has published a computer graphics capturing an asteroid in space and redirecting it to near-Earth orbit. "Capture" of the asteroid is planned for the sake of scientific purposes. For a successful operation, the celestial body must rotate around the sun, and its size should not exceed nine meters in diameter.

Nuclear weapons do not guarantee the salvation of the Earth from asteroids

Rehearsal of destruction

The European Space Agency (ESA) will conduct a rehearsal of the destruction. Asteroid 65802 Didim, discovered in 1996 year, was chosen for the role of the “victim”. This is a binary asteroid. The diameter of the main body 800 meters, and that which revolves around it at a distance of 1 kilometer, - 150 meters. In fact, Didim is a very “peaceful” asteroid in the sense that in the foreseeable future there is no threat to the Earth from it. Nevertheless, ESA, together with NASA, intends to ram it with a spacecraft in the 2022 year, when it will be at a distance of 11 millions of kilometers from Earth.

The planned mission received the romantic name AIDA. True, she has nothing to do with the Italian composer Giuseppe Verdi, who wrote the opera of the same name. AIDA is an abbreviation for Asteroid Impact & Deflection Assessment, which translates as "Assessment of a collision with an asteroid and the subsequent change in its trajectory." And the spacecraft itself, which is to ram the asteroid, was named DART. In English, this word means "dart", but, as in the case of AIDA, this word is an abbreviation of the phrase Double Asteroid Redirection Test, or "Experiment to change the direction of motion of a double asteroid." "Dart" must crash into Didim at a speed of 22 kilometers per hour.

The effects of the impact will be observed by another device flying in parallel. It was called AIM, that is, the “target”, but, as in the first two cases, it is an abbreviation: AIM - Asteroid Impact Monitor (“Asteroid collision tracking”). The purpose of the observation is not only to estimate the impact of the impact on the asteroid's trajectory, but also to analyze the asteroid matter knocked out in the spectral range.

But where to place the interceptors of asteroids - on the surface of our planet or in Earth orbit? In orbit, they are in a state of "readiness number one" to repel a threat from space. This eliminates the risk that is always present when a spacecraft is launched into space. After all, it is at the start and launch stage that the probability of failure is highest. Imagine: an interceptor should be urgently sent to the asteroid, but the launch vehicle could not bring it out of the atmosphere. And the asteroid is flying ...

However, it was none other than the orbital location of the nuclear interceptors, but Edward Teller himself, the “father” of the American hydrogen bomb. In his opinion, one cannot simply bring nuclear explosive devices into near-Earth space and calmly watch them spin around the Earth. They will need to constantly maintain, and it will take time and money.

Involuntary obstacles to the creation of nuclear interceptors of asteroids and create international treaties. One of them is the Nuclear Test Ban Treaty in the atmosphere, outer space and under water of the 1963 year. The other is the Outer Space Treaty of 1967, which prohibits the introduction of nuclear weapons into space. But if people have a technological “shield” that can save them from the asteroid-comet apocalypse, then it would be extremely unwise to put political-diplomatic documents in their hands instead.
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  1. Tired
    Tired 13 March 2016 06: 21 New
    Somehow little to believe in this program. Large asteroids and even moving at high speed ... In general, when approaching this, people will only hope for the best. Well, or relax in a chair with a glass of wine in hand and with a sense of satisfaction for the life lived by civilization, look at the sky.
    1. Blondy
      Blondy 13 March 2016 08: 16 New
      Guys, what to worry about, this is a very long-term program, you can be 100% sure that in the next 100-200 years something very hard will not fall on your head, and then they will come up with something, but this is not our problem. The main task is completed - on time crowed and marked. Even Yellowstone seems much more relevant.
      1. Talgat
        Talgat 13 March 2016 17: 16 New
        This topic is not only about protection from asteroids

        I recently read it. what is very likely, under the guise of experiments on "pulling" asteroids from dangerous orbits to the side, a test is being carried out to use asteroids as weapons

        Asteroids are really hard to shoot down. There is no shock wave in a vacuum - and large asteroids are not very vulnerable to nuclear weapons. The speeds of asteroids can be gigantic - that is, space. This is many times more than "HYPERSound" or 1 - 2 space velocities - that is, it is difficult to intercept such objects.

        If someone can adjust the orbit a bit in the distance and direct an asteroid at the enemy - the speeds and sizes of which do not allow anything to be done with it - then this is an application for a weapon worse than nuclear
        1. Mahmut
          Mahmut 14 March 2016 06: 05 New
          Asteroids move in orbits parallel to the Earth's orbit, so their speed of approach to the Earth is minimal. Therefore, even a relatively small meteorite calmly flies to the surface of the earth without noise and light representations. One of them smacked in front of my eyes and is now in the sideboard. Another thing is comets, whose orbits are practically perpendicular to the Earth's orbit, which means that the speed of approach to the planet is more than 30 km / s. Both the Tunguska and Chebarkul "meteorites" were exactly comets. You can track at least a million peacefully floating meteorites from the asteroid belt, spending taxpayer money on this and getting a cometary strike without warning.
          1. Talgat
            Talgat 14 March 2016 16: 56 New
            Yes, most likely, you are right, after reading your comment I recall. T e not asteroids namely comets probably
  2. Siberia 9444
    Siberia 9444 13 March 2016 07: 00 New
    Yes, all normul Americans will fly and neutralize the asteroid laughing But seriously, we are not ready to face such a threat. Chelyabinsk is proof of that.
    1. Bacha
      Bacha 13 March 2016 20: 36 New
      How is it not ready? I personally am ready! The recorder is working on the machine, the action camera was bought on a helmet, registered on YouTube)))
      1. L92140
        L92140 20 March 2016 00: 15 New
        They say that Shoigu was very upset, for decades taught the population to fall in the direction of the flash, to close his head, with his hands, so there are no pictures laughing
  3. Pvi1206
    Pvi1206 13 March 2016 07: 09 New
    The probability of the fall of a large celestial "fragment" on Earth is very small.

    Everything that could fall to Earth from space and lead to the cessation of life has long fallen. Only after that a man appeared on our planet.
    When the Lord saw how "great the corruption of people on earth", He brought a worldwide flood on it, and not a large celestial object.
    SODOM AND GOMORRA are two cities, the mention of which in the Bible is associated primarily with the exceptional depravity of their inhabitants. In Genesis they are described as "cities of the plain" that God destroyed "with fire and brimstone." What happens when a volcano erupts.
    Humanity is waiting for another inevitable event - the end of the world, when the Sun goes out and the Earth ceases to exist. For the same reasons described earlier.
    So it’s impossible to be saved from the punishment of the Lord.
    But before the advent of these times, one can self-inflict disaster by changing the orbits of celestial bodies or attempting to explode them. Then it is as if disaster will fall on our unreasonable head.
    It is not the business of humans to intervene in the events of the macro and micro world.
    But they persistently do this, believing themselves to be smarter than the Creator, who created "everything visible and invisible" ...
    1. sa-ag
      sa-ag 13 March 2016 07: 43 New
      Quote: Pvi1206
      Humanity is waiting for another inevitable event - the end of the world, when the Sun goes out and the Earth ceases to exist.

      Well, in this case, the Earth will cease to exist long before the Sun goes out, about when the Sun begins to turn into a red giant and burns everything that is now on Earth :-)
    2. Samurai3X
      Samurai3X 13 March 2016 10: 46 New
      Believe, brothers, believe! Amen!
      Only the Lord will save us! We run to the nearest temple, we split our heads on the floor and everything will be fine, you don’t even need to think about anything!
    3. Razvedka_Boem
      Razvedka_Boem 13 March 2016 10: 57 New
      Lecture on astronomy. Lecturer: - After 2 billion years, our Sun will go out and life on Earth will cease.
      A voice from the back of the audience: - After how much, how much ?! - In two billion years .. - Thank God, I heard in two million ..
  4. SteelRatTV
    SteelRatTV 13 March 2016 07: 13 New
    At one time, I really liked the joke. I will convey the essence. Day One: A giant killer asteroid flies to Earth. Day Two: A heroic team is sent to the asteroid - to establish a nuclear charge and undermine the asteroid. Third day: a giant asteroid killer with a nuclear charge flies to Earth ... wassat
  5. igorka357
    igorka357 13 March 2016 08: 04 New
    Quietly quiet, which means an unpredictable, unsteady and poorly controlled trajectory, that it changes the direction of your flight there wink ? In space, this cannot be, there is a vacuum, and the object will fly only along the path that it has ever, someone started from somewhere, until it collides with another celestial body, only then it will change the path, well there is still an insignificant probability of a deviation to microns in view of the effect of solar winds .. but this is soon from the realm of fantasy! Generally dear readers, everything that goes beyond the near-earth orbit is just an assumption and guesses, the scientists themselves invented and proved themselves, only they don’t we were scientists from another planet who would refute ours, which is indicated by the sum of 4700 bodies, even if half of them were not found! They give us evidence of success by landing on the asteroid Itokave and taking a sample but .... the speed of all asteroids very different, one can move at a speed of 3 km.s., and the second will move at a speed of 59 km.s., can you scientists take an interest in it? I think that only cascading detonations of nuclear charges are close to the object, and what about Given the preservation of its integrity, they are able to take an object from a dangerous trajectory, but if it collapses, we will get shrapnel instead of a bullet, but all this will depend on the mass! For beginners of space lovers an article at the time, I also added, but essentially nothing!
    1. Alex
      Alex 13 March 2016 10: 58 New
      Quote: igorka357
      Quietly quiet, which means an unpredictable, unsteady, and poorly controlled path, does it change your flight direction there? This cannot happen in space, there is a vacuum, and the object will fly only along the path that it’s ever been or he launched it from somewhere until it collides with another celestial body, only then it will change the trajectory, well, there is still an insignificant probability of deviation to microns due to the influence of solar winds.

      Collisions in space, even in such a relatively "densely populated" area as the asteroid belt, are extremely unlikely - the distances are already very great. But the gravitational influence, especially of such giants as Jupiter and Saturn, is very large. Moreover, their effect is greatly enhanced if they are on the same straight line with the Sun. As a result, the orbits of short-flight and relatively light celestial bodies can be significantly curved, and even at a considerable distance. Such hooks in the trajectory have long been known in astronomy and are called "gravity assist". Both Neptune and Pluto were discovered precisely due to the gravitational influence on Uranus.

      So unpredictability, of course, is relative, but present. The problem is further aggravated by the fact that asteroids, as a rule, are dimly illuminated objects, which are very difficult to observe and, accordingly, take into account. But, IMHO, the meteorite danger is greatly exaggerated. Something I see here is undermining under nuclear weapons treaties in space. It would not have happened as in Murphy’s law:
      1. We will launch a nuclear bomb to repel danger from space.
      2. And who said that danger is from outer space?
  6. ML-334
    ML-334 13 March 2016 08: 06 New
    Humans may not worry about the globe - for they, on it, are not alone. No one will allow the planet to be destroyed from outside and inside.
  7. avg-mgn
    avg-mgn 13 March 2016 09: 16 New
    Dear editor! Maybe better about the reactor,
    About your favorite moon tractor? After all, you can not the same year
    Then the plates are scared, they say, mean, fly,
    Then you have dogs barking, then ruins say.

    (V.S. Vysotsky)

    Spring, birds sing, life wakes up ... And here again they teach how to wash grandmas.
  8. lotar
    lotar 13 March 2016 09: 58 New
    I am confused by the above estimate of the probable number of asteroids, considering that we can see only a part of objects with a relatively high albedo. I think that this amount is rather underestimated than overestimated. And the ability of our civilization to prevent a potential collision and generally consider it depressingly weak. that humanity spends on the destruction of their own kind sent in a different direction, then yes, they would have thought up something to implement these ideas.
  9. sabakina
    sabakina 13 March 2016 10: 10 New
    I can calm you down a little. In the swamps of Siberia there are some "cauldrons", the purpose of which is unknown to man. But it is known that in case of danger something flew out of these swamps and literally evaporated the "aliens". Have you found the "Tunguska meteorite"? No. And he was. There is a documentary about it. right now I don’t remember the name and won’t find it.
    The most interesting thing is why this "missile defense" was located in Russia? ...
    1. Vadim237
      Vadim237 13 March 2016 10: 34 New
      You must have reviewed REN TV.
    2. Razvedka_Boem
      Razvedka_Boem 13 March 2016 10: 59 New
      Apparently because their creators lived on that territory.
    3. AlexSK
      AlexSK 13 March 2016 11: 36 New
  10. sw6513
    sw6513 13 March 2016 11: 04 New
    The title of the article is correct-man is nothing against such cataclysms ..
  11. Falcon5555
    Falcon5555 13 March 2016 14: 56 New
    I wonder how they consider the probability of collision with asteroids? Indeed, if they simply do not know at all where it will fly near the Earth to the right or left, close or far, then the probability of a collision will be numerically very low. But this somehow does not reassure.
  12. chelovektapok
    chelovektapok 13 March 2016 15: 07 New
    Or maybe .... Well, to negotiate with the asteroid? Declare a truce? Explain to him the inadmissibility of behavior? There are precedents! Probably help!
  13. Mountain shooter
    Mountain shooter 13 March 2016 15: 24 New
    Mankind will not be able to repulse the threat that has suddenly arisen - there simply are no technologies that can solve the problem. But if the ship that Kiriyenko said was to be created, this one could maneuver, catch up, lay a megaton charge and smash a decent sized asteroid into small pieces.
  14. TOR2
    TOR2 13 March 2016 16: 03 New
    The Chelyabinsk meteorite moved in the atmosphere at a speed of 20-30 km / s. Intercepting an object at that speed is certainly tempting. Suppose, in the framework of the program for intercepting hypersonic devices, our air defense systems will have several installations capable of creating plasma formations along the path of very high-speed objects. Given that the density of this formation will be much lower than the density of the atmosphere, the body of the asteroid will collapse (unless of course it is huge). The explosion will certainly be of enormous power, but a real explosion of indignation will be across the ocean. smile
    And the reaction is something like this.
  15. akula
    akula 13 March 2016 16: 16 New
    The article is strange and very improbable. Who, for example, knows how many billions of years ago the last major asteroid crashed into the Earth? And where are such perfect spacecraft that one flies straight, another cracks through, a third explodes, a fourth observes, even if there are no perfect launch vehicles, they’re constantly falling. And how much fuel is needed, who will be dragging it in such quantities? Here on the Earth itself, people made a complete mess, and also in space they decided to restore order.
  16. Baloo
    Baloo 13 March 2016 18: 29 New
    I walked by, here I want to ask enlightened colleagues. Why should there be one bomb in an asteroid, but should it be destroyed? Maybe like in a tangential billiard or crush with several warheads? Although I’m militarily uneducated, excuse me if someone annoys the question. hi
    1. Alex
      Alex 13 March 2016 20: 03 New
      Quote: Balu
      Although I’m militarily uneducated, excuse me if someone annoys the question.
      Everything is in order, there is a forum for asking questions and sharing opinions.

      On the merits of the question. IMHO, here the problems are purely technical: it is obvious that even one direct hit is not an easy question, here it will not be in near-earth space, but at a great distance. And after the explosion, that asteroid (or what remains of it) still needs to be found. So it's easier once, but as the unforgettable Lelik said: "I will hit hard, but carefully."

      On the tangent. Here already classical physics does not allow, or rather, the law of conservation of momentum. To change the impulse vector (direction and / or speed), the action of a comparable vector is required. And momentum is the product of speed and mass. With masses (the same Apophis weighs "nothing at all" - about 3 * 10 ^ 7 tons) and speeds (about 25-35 km / s) of asteroids, I can't even imagine what a glancing impact should be. This is not even an attempt by a mosquito to knock a locomotive off the rails, but rather a virus against an icebreaker.

      In general, the problem is considerable, but there are no reasons for hysteria either. The probability, although it exists, is very small. In any case, there is enough time to solve both theoretical and practical issues, the question is only about the seriousness of the approach.

      Glad I helped you somehow.
  17. catch22
    catch22 13 March 2016 18: 49 New
    The most important thing is that by the time the asteroid approaches Earth, Bruce Willis is in good health and physical condition, then you can sleep peacefully, the world will be saved!
  18. AID.S
    AID.S 14 March 2016 00: 57 New
    AAAAAA! We are all going to die !!! I won’t go to work !!!
  19. Mikhalychch
    Mikhalychch 14 March 2016 03: 12 New
    As soon as the crisis in the country begins, such articles and a bunch of psychics appear even on Channel 1, which is what they write and show so that people will be taken away from the true causes of the country's death, and elections will be soon.
  20. ML-334
    ML-334 14 March 2016 10: 12 New
    Gentlemen! Before you put a minus, justify it. I don’t even know whether I am ignorant or not, or let’s say that the minus one did not stand up. If all the academics are here, cheat me on my mistakes or I will die without knowing the truth. With respect to all, Victor.
  21. voyaka uh
    voyaka uh 16 March 2016 18: 36 New
    A very good article. The most detailed of all that
    I came across.
    People have already reached the technological level.
    to fight asteroids. All that is needed is joining forces and financing.
    1) Exploration - a network of satellites for observing asteroids, and a network of special
    telescopes on earth. It’s no more complicated than a network of communication satellites or satellites,
    watching the weather.
    2) have prepared missiles, ramming apparatus and nuclear charges "on scientific combat" duty.
    This is also much simpler than containing hundreds of ICBMs.
    It is enough to have 3-4 rockets for safety. Run to a dangerous asteroid 2 pieces, like two SAM
    by plane.
    Technically, the problem is solvable, it’s easier than planned inhabited expeditions to Mars and easier
    ISS. And ... more useful than the last