Slashdot Mirror


Space Litter To Hit Earth Tomorrow

A refrigerator-sized tank of toxic ammonia, tossed from the international space station last year, is expected to hit earth tomorrow afternoon or evening. The 1,400-pound object was deliberately jettisoned — by hand — from the ISS's robot arm in July 2007. Since the time of re-entry is uncertain, so is the location. "NASA expects up to 15 pieces of the tank to survive the searing hot temperatures of re-entry, ranging in size from about 1.4 ounces (40 grams) to nearly 40 pounds (17.5 kilograms). ... [T]he largest pieces could slam into the Earth's surface at about 100 mph (161 kph). ...'If anybody found a piece of anything on the ground Monday morning, I would hope they wouldn't get too close to it,' [a NASA spokesman] said."

60 of 443 comments (clear)

  1. Cloudy by DeadPixels · · Score: 5, Funny

    With a chance of toxic ammonia-coated metal chunks?

    1. Re:Cloudy by JustOK · · Score: 5, Funny

      Space trash wins. Next question.

      --
      rewriting history since 2109
    2. Re:Cloudy by Suzuran · · Score: 5, Funny

      Newton.

    3. Re:Cloudy by nmb3000 · · Score: 5, Funny

      17 kg at 160 kph could hit the earth anywhere?
      What if it hits SOMETHING, like a car in the highway or an airplane?

      A Boeing 747 with mass 340,000 kg takes off from JFK airport at 3:00 pm and heads towards Los Angeles at a cruising speed of 800 kph. A refrigerator-sized tank of toxic ammonia with mass 17 kg jettisoned from the ISS 560 days prior is about to achieve re-entry at 160 kph. Where and when will they meet?

      I hate these stupid questions.

      --
      "What do you despise? By this are you truly known." --Princess Irulan, Manual of Muad'Dib
      /)
    4. Re:Cloudy by wellingj · · Score: 3, Interesting

      Given the distribution of objects and people near or on any road, compared with the probability that the asteroid hits any where near a population of meaningful size to even have a tiny chance of hitting a person, I'd say you have a better chance of hitting some one with your car than some one being hit by this chunk falling from space.

    5. Re:Cloudy by Anonymous Coward · · Score: 4, Funny

      He'll aim it at Sarah Palin. That's what she gets for not believing in gravity.

    6. Re:Cloudy by Austerity+Empowers · · Score: 4, Funny

      This sunday, Sunday, SUNDAY at The Coliseum!

    7. Re:Cloudy by binarylarry · · Score: 4, Funny

      So NASA is raining down piss waste on us all.

      Yep, sounds like the government at work all right.

      --
      Mod me down, my New Earth Global Warmingist friends!
    8. Re:Cloudy by Amazing+Quantum+Man · · Score: 3, Funny

      To be honest, my daughter thought I was crazy...

      In her algebra class, she got the "Train Question"! I was so excited!

      --
      Fascism starts when the efficiency of the government becomes more important than the rights of the people.
    9. Re:Cloudy by hbp4c · · Score: 5, Informative

      "The Early Ammonia Servicer (EAS) is a very large, 1400 pound tank of ammonia that was used to cool electronics on the International Space Station (ISS). When a permanent cooling system was installed, the EAS was thrown overboard by spacewalking astronaut Clayton Anderson on July 23, 2007. NASA does not normally dispose of debris by throwing it overboard. The risk of collision with the International Space Station or another satellite does not justify the ease of disposing of debris this way. In the case of the Early Ammonia Servicer, it was too heavy and dangerous (because of the ammonia) to return to Earth in the Space Shuttle, and throwing it overboard was the only option. The EAS has been in a slowly decaying orbit since then." - blatantly copied from an email I received earlier today on this subject.

    10. Re:Cloudy by fuzzyfuzzyfungus · · Score: 3, Informative

      TFA answers your question. The station has, or had, an ammonia refrigeration system. This tank contained the refrigerant reserve for that.

    11. Re:Cloudy by Hognoxious · · Score: 4, Insightful

      why worry about random piece of space junk hitting earth? The likehood of that affecting me is virtually zero. People take much bigger risks than that each and every day, which was my point.

      There's an old saying that no matter how good a driver you are, you have to worry about all the other idiots on the road. However you still have some degree of control; I can to a certain extent spot crap drivers and give them a wide berth, or be mentally prepared for their craptitude which can shave a litle off the reaction time when I need to take evasive action.

      If a lump of random spacecrap is going to land on you, it's going to land on you. There's sod all you can do about it. I doubt the prediction is timely and accurate enough that you could get the heck away or shelter in a basement when it hits.

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    12. Re:Cloudy by narcberry · · Score: 3, Funny

      That's the same reason I don't care what's behind my target when I go shooting.

      --
      Modding me -1 troll doesn't make me wrong.
    13. Re:Cloudy by Beardo+the+Bearded · · Score: 4, Funny

      It's not gravity; it's Intelligent Falling. Science can try to explain, but if science is real, then why is there no fossil record for gravity?

      See, you've got no answer for that, so therefore I win.

      --

      ---
      ECHELON is a government program to find words like bomb, jihad, plutonium, assassinate, and anarchy.
    14. Re:Cloudy by ColdWetDog · · Score: 4, Funny

      In space, no one can hear you WHOOSH.

      --
      Faster! Faster! Faster would be better!
    15. Re:Cloudy by NemosomeN · · Score: 3, Informative

      Ammonia, in its pure, gaseous form, is used as a refrigerant. It cools much colder than freon. It's used in industry to freeze meat products, though some have gone to (less effective, but "safer") CO2, which is actually more dangerous. CO2 is less toxic, but NOBODY fails to recognize an ammonia leak.

      --
      I hate grammar Nazi's.
    16. Re:Cloudy by kf6auf · · Score: 3, Informative

      IANA rocket scientist, but I am a physicist and the physics here is fairly straightforward. No matter how you throw it, if you can't throw it hard enough to enter the earth's atmosphere before it makes it to the other side of the planet, it will go back to the exact same spot you threw it from due to energy conservation. Exceptions only exist if the initial (ISS) orbit is highly elliptical (it's almost circular) so that it processes a lot or if you put a rocket on it, in which case energy conservation behaves less simply. The least energy intensive way of getting it to impact the atmosphere is to throw it backwards so that it's not going fast enough to maintain orbit at that radius and so it will fall toward the earth and hopefully impact the atmosphere. IIRC, this is called a Hohmann transfer orbit. Note that it is not possible to get a object from one circular orbit to another without not one but two impulses, which means you would need a rocket on the trash.

    17. Re:Cloudy by Teancum · · Score: 3, Informative

      The answer to this has to do more with what the rest of the ISS is doing than the little piece of trash that you are throwing "overboard".

      You are completely correct that anything you toss out will eventually come back and hit you no matter how hard you throw it. Well, that is if that is the only thing you have tossed and in a completely pure mathematical sense.

      At the ISS altitude you are still somewhat inside the Earth's atmosphere anyway, so everything has a bit of atmospheric drag to it. Yeah, it is so little "atmosphere" that it might as well be the best vacuum you can find on any ground-based laboratory, but getting pelted by air molecules still eventually slow down spacecraft, including the ISS. That is also the reason why this tank is even in the news at all right now.

      The ISS has to use thrusters and "boosts" from the shuttle visits to raise the altitude of the station periodically. As soon as this happens, the station is in a completely different orbit from the trash, which can then take its sweet time to crash to the Earth eventually.

      Both Skylab and MIR suffered the ultimate consequences of what would happen if you didn't perform this periodic boosting... and ultimately came crashing to the Earth. The ISS is large enough that, at least from what I understand, the partner agencies don't ever want to see that happen.

  2. "toxic ammonia"? by penginkun · · Score: 5, Funny

    As opposed to that non-toxic, safe-to-eat, oh-so-good-for-you ammonia they sell down at the cleaning supplies store?

    1. Re:"toxic ammonia"? by vidarh · · Score: 4, Interesting
      Heh. A lot of Scandinavian candy contains ammonium chloride...

      I've yet to meet any non-Scandinavian that likes it, though apparently they sell they stuff in the Netherlands and Germany too.

    2. Re:"toxic ammonia"? by mrchaotica · · Score: 5, Informative

      Ammonium chloride is not even slightly like ammonia, in the same way that table salt is not even slightly like chlorine gas.

      --

      "[Regarding the 'cloud,'] ownership was what made America different than Russia." -- Woz

    3. Re:"toxic ammonia"? by DittoBox · · Score: 4, Funny

      Windex is a lot less bad for you than cat piss. Believe me.

      Of course ingesting either one is a seriously FUBUAR proposition, but I digress.

      --
      Good. Cheap. Fast. Pick Two.
    4. Re:"toxic ammonia"? by Daimanta · · Score: 5, Funny

      Yeah, it's called salmiak and it's probably an acquired taste. I have heard of a person who said that it tasted like catpiss. But on the other hand, the Americans invented McDonalds so I guess that makes us even :)

      --
      Knowledge is power. Knowledge shared is power lost.
    5. Re:"toxic ammonia"? by dkf · · Score: 5, Funny

      Is idiocy a prerequisite for getting mod points?

      No, but it helps! After all, I've been modded up quite a few times over the years...

      --
      "Little does he know, but there is no 'I' in 'Idiot'!"
    6. Re:"toxic ammonia"? by JoeMerchant · · Score: 4, Insightful

      Does it strike anyone else as improbable that any significant amount of ammonia gas will be anywhere near that 17kg chunk of metal that survives reentry?

    7. Re:"toxic ammonia"? by v1 · · Score: 4, Funny

      I have heard of a person who said that it tasted like catpiss

      I don't know anyone that knows what cat piss tastes like. Do you?

      --
      I work for the Department of Redundancy Department.
    8. Re:"toxic ammonia"? by kaens · · Score: 4, Funny

      I know what cat piss tastes like, but I've never tried salmiak.

    9. Re:"toxic ammonia"? by LearnToSpell · · Score: 4, Funny

      Only if it lands on a pissing cat.

  3. Current data on object by lecithin · · Score: 4, Informative
    --
    It could be worse, it could be Monday.
    1. Re:Current data on object by bruins01 · · Score: 5, Funny

      Your sig takes on a whole new meaning in light of that quotation in the summary.

  4. Did anyone else think.... by zappepcs · · Score: 4, Interesting

    about how cool this is?

    First, here is NASA being about as open about it as they can get. We dumped a toxic container out, and it might hit your house or spouse or both. Possible reason for joy?

    Second, 50 years ago there was probably only two people on the entire planet that could have thought such a safety announcement would be put out with all the fame and glory of a news item about a fender bender in the WalMart parking lot!

    I kind of look forward to news reports like this:

    Space weather warning: Launch News- Today in the Southern Americas regions, the likelihood of debris showers is at Threat Level Orange. Expected drop zone is 15 miles off the coast of Peru as the StarLiner "Moses" launches for Alpha Centauri.
    Between the hours of 13:00 GMT and 23:50 GMT, some pieces of the launch platform are expected to survive the searing heat of re-entry. It is possible for pieces up to 57 kilograms to reach the Earth's surface. Please contact the local constabulary for concerns about livestock. Normal insurance claim processes apply.

    You all wanted flying cars. I want star cruisers and Earth 2.0.

  5. Re:Landfall projection? by John+Hasler · · Score: 3, Insightful

    Natural space junk of similar mass hits the Earth all the time. When was the last time you heard of anyone getting killed by a meteorite?

    --
    Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
  6. Nasa Suess by Tablizer · · Score: 4, Funny

    A star is falling
    With nasty goo
    It's kinda sticky
    It smells like poo

    It may hit a house
    It may hit a mouse
    And if you don't look out
    It will hit your spouse

    But you can't duck
    And you can't run
    'Cause it's falling faster
    Than a Bullet from a Gun

    It might hit with a thud
    Or a squishy "smoosh"
    It may make a hole
    Or knock out a tooth

    Quickly Quickly!
    Find somebody to sue
    For the fast and smelly
    Outer space goo!

  7. Re:clue ? by exley · · Score: 3, Funny

    I don't expect for people to RTFA here, but at least RTFS. It's not rocket science, you know.

  8. Re:clue ? by mrchaotica · · Score: 4, Informative

    A large one might dent your car in the extremely improbable case that one should hit it.

    TFA says the largest piece could be about 40 pounds and hit at 100 mph. That wouldn't dent your car, it would totally destroy it.

    --

    "[Regarding the 'cloud,'] ownership was what made America different than Russia." -- Woz

  9. A tinfoil hat moment... by pongo000 · · Score: 3, Interesting

    ...'If anybody found a piece of anything on the ground Monday morning, I would hope they wouldn't get too close to it,' [a NASA spokesman] said."

    Hmm...and why might that be? Some stray ammonia molecules might still be clinging to said pieces? I read somewhere (probably here) that meteorites are actually cool to the touch if they arrive on the ground intact. I don't recall pieces of Columbia starting fires upon impact.

    So if temperature isn't the issue, why would a NASA spokesman make such an inane statement?

  10. An important detail by techno-vampire · · Score: 3, Interesting

    There's something important that the summary ignored. (surprise, surprise) If you RTFA, you'll learn that the tank is filled with "toxic ammonia coolant." That means that the contents are very good at absorbing heat; else they'd be no good as a coolant. And, we all know that reentry generates lots and lots of heat. I wonder if anybody at NASA knows how much pressure that tank can hold and how likely it is to burst long before it reaches the ground.

    --
    Good, inexpensive web hosting
    1. Re:An important detail by Xeth · · Score: 4, Funny

      I wonder if anybody at NASA knows how much pressure that tank can hold and how likely it is to burst long before it reaches the ground.

      I'm going to go out on a limb and say... yes, someone probably does.

      --
      If your theory is different from practice, then your theory is wrong.
  11. Re:Could/Should we push all the junk back at earth by SnarfQuest · · Score: 5, Funny

    They don't have a big enough shark to mount the laser on at the moment.

    --
    Who would win this election: Andrew Weiner vs Andrew Weiner's weiner.
  12. Re:Landfall projection? by Tony+Hoyle · · Score: 3, Interesting

    It's rare but being hit by metorites *does* happen. I can't find a recorded instance since 2002 (although there's a nice picture of a destroyed car from 1992 which probably doesn't count as it didn't hit a person.

    Of course by the time it hits someone it's normally little more than a very hot pebble, and causes little more than some burning.

    If something the size of a fridge hit you you'd feel a little bit more than a burning sensation!

  13. Hrmm... by hack++slash · · Score: 5, Funny

    When this refrigerator sized chunk hits the ground and finally stops rolling, will it open and Indiana Jones falls out?

    --
    To do something right, you often have to roll up your sleeves and get busy.
  14. Andromeda strain by rossdee · · Score: 3, Funny

    There mught be some alien microoganism clinging to the debris, that could clot all your blood in seconds (unless you're a wino with an ulcer taking asprin...)

  15. The World Will End? by ticklemeozmo · · Score: 4, Funny

    Some weird looking bunny told me this news yesterday.  Wonder how he knew?

    --
    When modding "Informative", please make sure it both has a source and IS actually informative.
  16. Re:clue ? by eln · · Score: 5, Funny

    A 40 pound child is a little more...yielding than a 40 pound chunk of metal. Also, the 40 pound chunk of metal would presumably be falling on the car from above, not hitting the car head-on. So yah, it may not actually reduce the entire car to a smoking crater, but it would likely total it.

    So, while I have no doubt you have plentiful experience striking 40 pound children with vehicles, I'm not sure that experience is directly applicable to the situation at hand.

  17. Re:Landfall projection? by John+Hasler · · Score: 3, Informative

    > It's rare but being hit by metorites *does* happen.

    That's my point. six billion people, it's rare that any are hit by all that natural junk, and you are worried about this?

    > If something the size of a fridge hit you you'd feel a little bit more than a burning
    > sensation!

    NASA says no pieces larger than 40lb.

    --
    Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
  18. Re:clue ? by emandres · · Score: 4, Funny

    Conservation of momentum - the effect of a car traveling at 100mph hitting a child is not the same as a child traveling at 100mph hitting a car. If you can follow the unformatted math:
    M_car * V_car = (~1000 kg)(44.7 m/s) ~= 44700 kg*m/s
    M_child * V_child = (~20 kg)(44.7 m/s) ~= 894 kg*m/s
    The fact that the child is a lot more *squishy* than the car has little to do with it. If you want a comparable situation, think of throwing a turkey at 100mph at a parked car. I guarantee you that car's not going to come out looking to good.

    --
    The only way to tell the difference between a hamster and a gerbil is that the hamster has more white meat.
  19. Re:clue ? by Khuffie · · Score: 3, Funny

    Did you see the part where it says the answer to your question is currently unknown?

  20. Re:clue ? by Xandar01 · · Score: 4, Funny

    > If you want a comparable situation, think of throwing a turkey at 100mph at a parked car. I guarantee you that car's not going to come out looking to good.

    Is that a frozen or thawed turkey??

    --
    Life moves pretty fast; if you don't stop and look around once in a while, you could miss it. -FB
  21. Re:clue ? by dkf · · Score: 4, Funny

    > If you want a comparable situation, think of throwing a turkey at 100mph at a parked car. I guarantee you that car's not going to come out looking to good.

    Is that a frozen or thawed turkey??

    That reminds me of the story about when they were testing high speed electric trains for what happens when a bird-strike occurs. To do this, they got hold of a linear accelerator, put a turkey in it, and fired it at the front of the train, head on. The bird went straight through the windscreen, the driver's seat, and embedded itself deep within the transformer block behind! To say that the train engineers were dismayed misses the point by a country mile, but they cheered up rather a lot when the realized that they'd forgotten to defrost the turkey first, and that repeating with a fresh bird resulted in a safe splat with no danger to human life.

    I'll let someone else karma-whore with the link.

    --
    "Little does he know, but there is no 'I' in 'Idiot'!"
  22. Re:Landfall projection? by jamesh · · Score: 3, Insightful

    That's my point. six billion people, it's rare that any are hit by all that natural junk, and you are worried about this?

    I've wondered about this before. A good percentage of those six billion people are in places where it might not be reported if one of them were killed by something falling from above... how sure are we that it hasn't happened once or twice before and we just never heard about it?

  23. Re:Could/Should we push all the junk back at earth by JoeMerchant · · Score: 5, Funny

    Assuming a capable laser system, would a gentle laser push towards earth be a good way to clean up space junk? Would away from earth be better?

    A laser which would simply annihilate the junk would be admittedly cooler, but could de-orbit be accomplished with much less power?

    Last time I tried to get my car to roll backwards by turning on the headlights, it took a really long time....

  24. Re:clue by RockWolf · · Score: 5, Funny

    So, while I have no doubt you have plentiful experience striking 40 pound children with vehicles, I'm not sure that experience is directly applicable to the situation at hand.

    We start by assuming a perfectly spherical 40lb child of uniform density...

    --
    February 9th, 2009 8:55pm: Slashdot becomes self-aware.
  25. Re:clue by melted+keyboard · · Score: 5, Funny

    Ok,... American child,... got it. What next?

  26. What kills you matters... by titzandkunt · · Score: 3, Interesting


    Have a look at Professer John Adams' analysis of people's understanding, assessment amd reaction to various sources of risk... He's spent a lifetime studying the whole field of "risk", and his idea of risk amplification seems to be gaining traction within the field:

    http://www.socialaffairsunit.org.uk/blog/archives/000512.php

    --
    Political language ... is designed to make lies sound truthful and murder respectable...
  27. Odds Of,,, by maz2331 · · Score: 4, Funny

    Considering the uncertainty of where it will hit, what does the /. community think would be a good line to place on any of these occuring:

    1. Debris Hits John McCain in the head?
    2. Debris Hits John McCain AND Sarah Palin in the head?
    3. Debris hits Barak Obama in the head?
    4. Debris Hits Barak Obama AND Joe Biden in the head?
    5. Debris Hits George Bush in the head?
    6. Debris Hits Osama bin Laden in the head?
    7. Debris hits nobody in the head?
    8. Debris hits nobody's house?
    9. Debris causes zero real damage to everything?
    10. Who cares what we talk about on /. anyway?

    1. Re:Odds Of,,, by Foobar+of+Borg · · Score: 3, Funny
      You forgot:

      11. Debris hits Cowboy Neal on the head

      Then, we can have a real poll.

  28. The Silver Lining by ChangelingJane · · Score: 4, Funny

    This is like a lottery ticket for people who are both suicidal and seriously lazy.

  29. Re:Could/Should we push all the junk back at earth by toddestan · · Score: 4, Funny

    Last time I tried to get my car to roll backwards by turning on the headlights, it took a really long time....

    Well next time, try taping some cardboard over the taillights or something.

  30. depends on the country by AliasMarlowe · · Score: 3, Informative
    An ignoramus, posting as an AC, blurted out:

    Then stop riding in the goddamn street, motherfucker. It's common courtesy. Ride on the damn sidewalk. go ahead, scaredy-cat. Just try it, I promise that passing policemen will not stop and ticket you.

    In Germany, Finland and numerous other countries, cyclists are expected to stay on the sidewalk, and not on the road. They might be ticketed if caught cycling on the road if the road has a sidewalk.

    In Great Britain, Ireland, and numerous other countries, cyclists are expected to stay on the road, and not on the sidewalk. They might be ticketed if caught cycling on the sidewalk.

    These laws are unevenly enforced.

    --
    Those who can make you believe absurdities can make you commit atrocities. - Voltaire
  31. Hmmmmm..... by IHC+Navistar · · Score: 4, Funny

    A single sheet of newspaper blows off my boat into the water and I get a $100 fine for littering.

    NASA intentionally hurls a "refrigerator-sized tank of toxic ammonia" weighing 1400 pounds into the ocean and nothing happens to them.

    Something doesn't add up.

    --
    Knowing Google's lust for data collection, the Soviet Union is still alive and well inside the psyche of Sergey Brin....