Slashdot Mirror


Huygens Probe Prepares for Saturn Moon Landing

Nathan writes "A probe is about to land on one of Saturn's 35 moons, Titan. The probe is a collaboration with NASA, the European Space Agency and Italy's space program. The probe is apparently about the size of a Volkswagen Beetle. This landing should lead scientists toward new information about the atmosphere and the magnetosphere."

15 of 273 comments (clear)

  1. Probe size by TWX · · Score: 4, Funny

    "The probe is apparently about the size of a Volkswagen Beetle."

    An original Beetle, or a Super Beetle? Or even a new water-cooled "New Beetle"?

    With the Italian involvement, wouldn't comparing it to a Volkswagen Scirocco be more appropriate?

    at least the probe isn't being compared to a Ford Probe...

    --
    Do not look into laser with remaining eye.
    1. Re:Probe size by Waffle+Iron · · Score: 5, Funny
      An original Beetle, or a Super Beetle? Or even a new water-cooled "New Beetle"?

      After NASA's previous troubles with imperial measurements, I'm glad to see that they're moving to standard pop-scientific units. The standard unit of volume is based on the Super Beetle, since that was the current model when this benchmark first came into widespread use.

      BTW, the standard Beetle has recently been redefined in terms of human hair; it is now defined as exactly 1.374569443*10^14 cubic human hair widths. The length of a football field and the distance from New York to San Francisco have similarly been redefined as hair multiples. These recent harmonizations will help bring a new consistency to science news stories across all media outlets.

  2. Re:35 moons! by BTWR · · Score: 4, Insightful
    What amazes me is that Mars, a planet with a third the mass of Earth, has two moons

    Mars has 2 captured asteroids as moons (most likely), whereas we have a gigantic almost-a-double-planet-system going. It's not surprising that Mars, one of the asteroid belt "border" planets would have such a moon (let a lone 2).

  3. Timeline and (better) coverage... by John+Miles · · Score: 5, Informative

    ... at SpaceFlight Now

    It'd be worth staying up for, but the last time I did that, I jinxed the Mars Polar Lander. :(

    If the Huygens timeline executes as planned, it will rank among the coolest engineering achievements in history. It will also have happened thanks to one guy who kept his eye on the ball when nobody else was paying attention.

    --
    Dahlmann tightly grips the knife, which he may have no idea how to use, and steps out into the plain.
    1. Re:Timeline and (better) coverage... by wallitron · · Score: 4, Informative

      Nice save.

      "In short: Cassini is at Saturn, and about to launch the Huygens probe into Titan's atmosphere (splashdown 14th January 2005). The communication link between Huygens and Cassini was not thoroughly tested before launch. Some thoughtful engineer realised this might be a problem, and after some pushing against resistance, managed to test Cassini's response to how they expect the signal from Huygens to look. Surprise suprise, Houston we have a problem. Turns out, the original engineers took account of doppler shift in the carrier wave, but not in the encoded data. D'oh! Problem is encoded in firmware, can't be fixed after launch. Double d'oh! So instead, they've altered Cassini's trajectory to eliminate the doppler shift. Hurrah for Boris Smeds!"

      http://gimbo.org.uk/archives/2005/01/boris_smeds_v s.html

  4. Re:Good luck! by lucabrasi999 · · Score: 4, Funny
    I wish everybody involved good luck

    Wait...are you wishing them good luck in Metric or English measurements?

  5. Here is a Countdown by mowler2 · · Score: 4, Informative

    Here is the official ESA countdown! At the moment, it's only 4 hours left! :) However, after landing, it will take another 5 hours before the data starts coming in, and we know wether it was a success or a failure.

    In the application, you can also fastforward and see what Cassini does in the coming years.

  6. Umm .... mars? by Craig+Ringer · · Score: 4, Insightful

    Dude, NASA are sending out space probes. Each one is new, different, and complex. They travel utterly incomprehensible distances and deal with really difficult environments. I'm usually astonished whenever one works.

    Then there's the small matter of the mars rovers, which both worked beyond all possible expectations.

    NASA have had their fair share of screw-ups, but I think if there's anything to take them to task about its their beaurocracy and the amount it costs them to do things, rather than their success rate. I'd like to see them able to lob off far more probes for less money, even if a few more failed, but that doesn't seem to be how they work.

    Note that I'm no NASA fanboy, just trying to be a little realistic here.

  7. Re:35 moons! by lucabrasi999 · · Score: 4, Insightful
    I wish Earth were as cool as that.

    Ah, but the Earth is cooler than the other side of the pillow. Our moon is very large in comparison to the size of Earth. Viewed from afar, the Earth/Moon combination must appear to be more like a set of twin planets, instead of a planet/satellite combination. Saturns planets, while some may be large, appear to be very small in comparison to Saturn.

    While none of us have experience in checking out other solar systems, I'll be willing to hypothesize that, in this galaxy, there are very few planet/satellite combinations that are very comparable in mass/size (as the Earth/Moon combo is).

    Check back with me when we get to Alpha Centauri in 10,000 years.

  8. For those interested in discussing this on irc by yuriwho · · Score: 4, Informative

    please join our irc channel #space on irc.freenode.net

    This channel is devoted to discussion of space science, current, past and future space missions.

    This channel is frequented by a lot of knowledgeable folk. And please keep the discussion on topic ;-)

    Y

    --
    no sig.
  9. Not NASA. by i41Overlord · · Score: 4, Informative

    The probe was built by the ESA, not NASA. Cassini is NASA, Huygens probe is ESA.

    And NASA's Mars rovers are still going strong, whereas the ESA's Beagle is just a crater.

  10. VLBI observations of Huygens' descent by zennor · · Score: 5, Interesting

    The data transmitted by Huygens will be uploaded to the Cassini spaceprobe and then transmitted by Cassini back to Earth several times. This data will be received by the NASA DSN dishes such as that a Tidbinbilla near Canberra in Australia.

    Separate to this will be a unique experimental observation organised by JIVE, the Joint Institute for VLBI in Europe that will involve 17 radio telescopes around the world including the Parkes dish in NSW. They will monitor the weak signal of the Huygens probe directly to detct any doppler shift in the signal. Using VLBI (Very Long Baseline Interferometry) astronomers hope to be able to pinpoint the entry of Huygens into Titan's atmosphere to within 1 km. As it descends under parachute they also hope to use doppler shifts to measure the speed of the wind at different levels in the atmosphere. Should be an interesting observation.

    (Disclaimer; I work for one of the institutes involved in this experiment)

  11. But Not ESA Either by Z+Chameleon · · Score: 5, Informative

    Beagle 2 was not an ESA probe but rather a British project which piggybacked on ESA's Mars Express orbiter (which is going strong by the way).

  12. www.esa.int by dolmen.fr · · Score: 5, Informative

    I won't blame anyone who hasn't RTFA for this news, because here is the really interesting link: the ESA (European Space Agency) portal.
    A 346 words article from India Daily is not the most relevant for an ESA project.

    I hope /. moderators would care a bit more when posting news. Recently the interesting links were often missing. A link to a press agency article may be interesting to some, but we have other sources for that. I expect a bit more from a /. news: the poster should at list post links to official sites with deeper information.

  13. Huygens' carrier signal detected! by EdibleEchidna · · Score: 4, Interesting

    According to ESA's website: The Robert C. Byrd Green Bank Telescope (GBT) in West Virginia, USA, a part of the global network of radio telescopes involved in tracking the Huygens Titan probe, has detected the probe's carrier signal.

    This means that the probe survived the entry (heat-shield) phase of the descent and the main parachute opened, but we still have to wait for the main part of the show...