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Voyager Set To Enter Interstellar Space

Phoghat writes "More than 30 years after they were launched, NASA's two Voyager probes have traveled to the edge of the solar system and are on the doorstep of interstellar space. Today, April 28, 2011, NASA held a live briefing to reflect on what the Voyager mission has accomplished — and to preview what lies ahead as the probes prepare to enter the realm of the Milky Way itself."

27 of 362 comments (clear)

  1. Let me say by milbournosphere · · Score: 5, Insightful

    Congratulations to the engineers working on the original project all those years ago. I couldn't fathom designing something like this with the toolset they had 30+ years ago. Props to them for creating a set of probes that are still relevant 30 years after their launch.

    1. Re:Let me say by www.sorehands.com · · Score: 3, Insightful

      An example of reliable code and engineering.

      It is a shame that programmers and engineers do not design and code their products so that they will be reliable.

      How many times did they have to reboot Voyager?

    2. Re:Let me say by Pseudonym+Authority · · Score: 5, Insightful

      It may have been a less advanced toolset, but the mindset back them was what really made it work. Back then, anything was possible, even expensive research unlikely to have any direct benifits. Now? If it isn't going to make a profit next month, trash it. Fuck the modern era. We did more with slide rules and determination than we do now with modern technology.

    3. Re:Let me say by Anonymous Coward · · Score: 5, Funny
      You know, they weren't club-wielding savages in loincloths back then.The most important tools they had back then were:

      1) A university system that wasn't designed to maximize profit therefore bringing in anyone into EE. Only actual engineers made it back then. The engineer working on the other system wasn't a dumbass.

      2) Computers and software were simpler and easier to understand instead of the morass of chaotic, barely-functioning layers of unknown code we have today.

      3) They had SPICE back then!

      4) Plenty enough technology to do what was needed.

    4. Re:Let me say by syousef · · Score: 4, Insightful

      Does every conversation on slashdot have to turn into a tirade about how stupid and frustrating and awful and shoddy and worthless and disappointing and shitty and aggravating and horrible windows is? We know already! It's also despicable and unreliable and saddening and ugly and untrustworthy and pernicious and inadequate and etc etc etc...

      Take your blinkers off. It's not just Windows.

      --
      These posts express my own personal views, not those of my employer
    5. Re:Let me say by md65536 · · Score: 4, Funny

      But the modern version would automatically update its Twitter account from space!

    6. Re:Let me say by FlyingGuy · · Score: 3, Informative

      More then likely written in pure Assembler or Machine Code. Hand Debugged, Hand Optimized back when software engineers were programmers in the very real sense of the word.

      Although unconfirmed AFAIK the whole thing is run on a RCA CDP1802, also known as the COSMAC (Complementary Symmetry Monolithic Array Computer) and at this moment the entire spacecraft runs on +/- 275 watts of power at 30 Volts DC which is pretty damn amazing.

      Put that in your god damn JVM/Python/PHP/Erlang/Lang De Jur pipe and smoke it ya damn weenies!

      --
      Hey KID! Yeah you, get the fuck off my lawn!
    7. Re:Let me say by slew · · Score: 5, Informative

      How many times did they have to reboot Voyager?

      In case you didn't know, it wasn't a reboot, but there was a problem where they actually did have to live patch the voyager 2 computer last year for a bit-flip problem...

      Of course this was discussed previously

      Although that's impressive, in general, the SW architecture of voyager is quite complicated and fragile, and during the operation, several mistakes have been made one of which caused the primary receiver on Voyager 2 to be accidently shut down, never to work again (so it's relying on a backup which has a faultly frequency tuning circuit which they compensate in software).

      It's really only heroics which keep these probes up and running. The original engineering, while impressive, is really not the thing that's keeping things working now...

    8. Re:Let me say by stuckinarut · · Score: 4, Informative

      Genuinely a brilliant lifetimes work, here's a nice write up by the LA Times on Ed Stone the Voyager lead scientist.

    9. Re:Let me say by Toam · · Score: 5, Funny

      "Just passing Uranus LOL"

    10. Re:Let me say by Nursie · · Score: 5, Insightful

      "It is a shame that programmers and engineers do not design and code their products so that they will be reliable."

      Speak for yourself.

      Some of us take pride in our work and write fast, reliable software that runs on servers for multiple years without interference.

    11. Re:Let me say by Holi · · Score: 3, Funny

      Lets just admit I should never post on slashdot after going to a 5 hour wine tasting

      --
      Sorry, teleporters just kill you and then make a copy. A perfect, soul-less copy.
    12. Re:Let me say by syousef · · Score: 4, Insightful

      You paid the equivalent of $700 for that setup. Did you pay that for your current media or audio center? People just barely pay that for a game console with an expected life of less-than-5 years.

      Yes, for the whole setup. A full stereo, not just a CD player. That included a tuner, turntable, 2 speakers, an amp, and control panels including an equalizer. The CD player was probably worth $200-$250 of that $700. And you would pay that today for a good Blu-ray player. Blu-ray now is at about the same point that CDs were when I bought in.

      So your quote of $1000 for a DVD player is a huge and ridiculous exaggeration. Quality control does not increase price by 2 orders of magnitude, and old tech gets cheaper as factories tool up and familiarity is gained with the ins and outs of the format.

      And I wasn't the only person that bought it.

      True. They would not have become ubiquitous otherwise. However, that market really wasn't sustainable, was it? Not in light of how many more people paid for cheaper versions of it. As time goes by, the desire to upgrade these components will go up as new fancy ways to use digital processors become fashionable. Again, this is the market dictating this, not the manufacturers. If it were the latter, we'd still have all those little repair shops all over the place like we did in the 80's.

      The market is quite sustainable. People haven't stopped buying gadgets. More people are able to afford them etc.

      The reason that you had little repair shops all over the place was that it cost more to replace than to fix. One reason for that was that quality control hadn't been thrown out the window. Today a manufacturer will put out shoddy rubbish to save $2 a unit. Most customers would pay an extra $2 for something that worked properly and lasted so blaming the consumer is just ridiculous misdirection. The blame lies squarely with manufacturers who refuse to back the quality of their products and instead compete on price point. The first few shoddy products ruin that manufacturer's reputation and they find they can no longer compete on quality.

      --
      These posts express my own personal views, not those of my employer
    13. Re:Let me say by IntentionalStance · · Score: 3, Interesting

      A friend of mine led the development team that built the onboard software for the Huygens probe. The QA cycles they went through would be insane for any normal project.

      For example they gave the compiled code to a completely separate team and got them to reverse engineer the specifications.

      This uncovered a Y2K bug in the ADA runtime that the code was built on

      As the test driven development mantra goes - test until you aren't scared any more
      Knowing that your code will be run once and only once in production, there's no second chances and that the box it's running on is some 10's of light hours away makes you rather easily scared

    14. Re:Let me say by IntentionalStance · · Score: 3, Insightful

      It may have been a less advanced toolset, but the mindset back them was what really made it work. Back then, anything was possible, even expensive research unlikely to have any direct benifits. Now? If it isn't going to make a profit next month, trash it. Fuck the modern era. We did more with slide rules and determination than we do now with modern technology.

      Nope re the mindset back then. I was coding for living back then and the ratio of good developers to bad developers is still pretty much the same now. Go and read the Mythical Man Month. What's sad is not that 'we were better at this stuff in the good old days' but that we, as an industry, haven't learned how to do things better having had 30 years of practice.

    15. Re:Let me say by sjames · · Score: 3, Interesting

      It all comes down to money. If you outsource your development to the lowest bidder and even try to beat a few more pennies out of their offer, you'll get a steaming pile. If you keep screaming "more coding faster!", you'll get a big steaming pile. Chase your best and brightest away with poor management and crazy bureaucratic proceduralism and you'll be lucky if the code is decentish.

      If you willingly spend $100/line of code and ASK when it will be done rather than TELLING when it will be done, it'll be near bulletproof.

    16. Re:Let me say by Anonymous Coward · · Score: 3, Informative

      In case you didn't know voyager 2 already does have a twitter account which is updated regularly.

    17. Re:Let me say by Mr.+Underbridge · · Score: 3, Funny

      If you willingly spend $100/line of code and ASK when it will be done rather than TELLING when it will be done, it'll be near bulletproof.

      So how is morale on the Duke Nukem dev team, anyway?

  2. Re:Just wait by txoof · · Score: 3, Funny

    I for one look forward to meeting our new Whale Loving overlords.

    --
    This one's tricky. You have to use imaginary numbers, like eleventeen... --Hobbes
  3. won't fly forever by melikamp · · Score: 4, Interesting

    I bet Voyagers won't fly forever. When space travel become cheap and safe enough, they will be seen as collectible items, and will be recovered. The two golden records will probably become the most expensive records money can buy.

  4. not yet by chowdahhead · · Score: 3

    They have a long way to go until they leave the Kuiper Belt and really reach the edge of our solar system, but impressive none the less.

    1. Re:not yet by Jeremy+Erwin · · Score: 4, Informative

      You're probably thinking of the Oort Cloud.

      From the wikipedia

      In August 2009, Voyager 1 was over 16.5 terameters (16.5×1012 meters, or 16.5×109 km, 110.7 AU, or 10.2 billion miles) from the Sun, and thus had entered the heliosheath region between solar wind's termination shock and the heliopause (the limit of the solar wind). Beyond heliopause is the bow shock of the interstellar medium, beyond which is interstellar space, a vast area where the Sun's influence gives way to that of the Milky Way galaxy in general. At this distance, light from the Sun takes over 16 hours to reach the probe.

      The Kuiper belt extends from 30 AU to 55 AU.

  5. Re:Just wait by md65536 · · Score: 3

    The real challenge will be dealing with the alien race of machines who interface with it and set out on a destructive journey toward Earth in order to contact its creator.

  6. Re:What exists beyond? by txoof · · Score: 4, Informative

    Radio Lab has a great episode interviewing Ann Druyan, Carl Sagan's widow, regarding her part in developing the sound recordings for the voyager mission. She beautifully captures the art and love inherent in such an awesome act of science and exploration. If you have a free few minutes, you won't be sorry you listened.

    --
    This one's tricky. You have to use imaginary numbers, like eleventeen... --Hobbes
  7. Voyagers, thank you for what you have given me by Slutticus · · Score: 5, Interesting

    The Voyager probes are approximately three months younger than me. All my life, I have followed the magical images and data these probes have been sending back to earth. In fact, it was the first images of saturn and jupiter that inspired me to be a scientist. It wasn't the pharma industry in which I work now. It wasn't the lure (lie?) of riches received for making the next big discovery. It was those probes, hurling through space sending back the most fascinating shit my young mind had ever witnessed. I spent almost my entire youth with my head buried in encyclopedias and books about astronomy, all made possible by Voyager 1 and 2. In the end I chose a different science path, but who knows...I could have ended up being a financial analyst (**shudders**)

  8. Re:How long till by PPH · · Score: 3, Funny

    Forever is a pretty long time, If something is physically possible, eventually it will happen.

    I know of several supermodels that will disagree.

    --
    Have gnu, will travel.
  9. How Long ? by mbone · · Score: 4, Informative

    It's not aimed at any other solar system, and the times involved are such that we can't predict what's going to happen very well.

    In places like Wikipedia you will read things like

    "in about 40,000 years [Voyager 1] will pass within 1.6 light years of the star AC+79 3888 in the constellation Camelopardalis."

    but this is highly misleading. 1.6 light years is almost 1000 times further away from that star than either Voyager is from the Sun right now, so it won't in any sense be "in" that stellar system.

    Worse, stars travel (relative to each other) at ~ 0.001 c, so even in 40,000 years all the nearby stars will move around by 10's of light years. We can estimate stellar velocities reasonably well, but their accelerations are very poorly measured, and so, after a few million years at most, we really don't know which star will go where.

    The bottom line is, it will be millions of years before any of these spacecraft get as close to another star as they are now, and we have no idea which star that will be... ... unless, of course, our descendants pick them up and put them in a museum somewhere, which is what I would predict.