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Cassini's Got Pictures And Data

MythMoth writes "To celebrate the anniversary of the Cassini-Huygens probe's orbital insertion, NASA's JPL has a set of fifteen amazing photos from the past year. Meanwhile, the BBC reports that some of the latest science data from the mission reveals that Saturn's ring system has its own (thin) O2 atmosphere, and that the planet's rotation seems to be slowing!"

27 of 109 comments (clear)

  1. He said "insertion" ... by Anonymous Coward · · Score: 5, Funny
    To celebrate the anniversary of the Cassini-Huygens probe's orbital insertion ...

    Hell, this is /., we'll celebrate anyone's insertion. Call me for the explosion.

  2. Death Star! by Anonymous Coward · · Score: 4, Funny

    Vote for the Death Star (you can figure out which one I mean)

    1. Re:Death Star! by neo1k · · Score: 2, Funny

      Oh my God! - it's full of stars!

  3. Titan's True Color OR Is That Mars...? by __aaclcg7560 · · Score: 2, Interesting

    The one picture that is supposed to show Titan's true color appears to be very similar to pictures of Mars having a bad air day. Is that picture really from Titan or did someone throw in a Mars photo?

    Inquiring minds want to know. :P

    1. Re:Titan's True Color OR Is That Mars...? by deglr6328 · · Score: 4, Informative

      It was BW. They used the spectral information from the DISR device (think of it as a single pixel of full very accurate color) and then used it to interpolate color for a whole image. Anywho, it's bizarre but the highest quality polished images didn't seem to come from the DISR group (bleech) but instead from amateurs, mere hours after descent no less. One should keep in mind this is all through an 1 byte/sec link from the probe....

      --
      - "Hear that?! The percolations are imminent! Cease your ingress!"
    2. Re:Titan's True Color OR Is That Mars...? by starbird · · Score: 2, Interesting

      You can only get so much data out of those images. when you polish those images, you're just amplifying the noise in the image. Making out details that might or might not exist. Its best not to 'polish' them too much or you might infer details that really arn't there.

  4. and they did it without a shuttle! by grikdog · · Score: 2, Insightful

    Cool about Cassini. NASA's Greatest Hits of the last few decades seem to be Lagrange Point planetary orbiters and the Hubble Space Telescope. I was going to credit the snake-bitten Shuttle missions for rescuing Hubble, but heck we're going to junk that.

    --
    ``Tension, apprehension & dissension have begun!'' - Duffy Wyg&, in Alfred Bester's _The Demolished Man_
  5. Can't wait for the video. by frostman · · Score: 3, Interesting

    I hope one day we get high-definition video from these missions.

    Imagine something like the the descent panorama but in the IMAX and later on your big fat TV.

    --

    This Like That - fun with words!

    1. Re:Can't wait for the video. by Bad+D.N.A. · · Score: 4, Informative

      Agreed... but... We would love to produce HD type pics from these missions. It's not a scientific problem, nor is it a technical problem, it's a financial problem! Let's take a look:

      The camera. This dude has to work in a radiation environment. You cannot just take your high-def Newegg purchased camera and launch it. These types of things have been tried before (non-flight qualified parts) and they don't last long. No, you have to build this bad boy from scratch with parts (CCDs, etc) that can withstand a severe radiation environment.

      BitRate. One of the significant cost issues on any mission is the science bitrate requirements. It costs a lot of money to get data back to Earth. First there is the instruments ability to collect such data (insignificant)... Second there is the spacecrafts ability to transmit this data, a very significant problem.. (with increased bitRate comes increased power requirements, increased mass, etc...) and with that comes a significant increase in the launch costs, to say nothing of the development costs.

      Collection... With an increased bitRate comes a greater requirement to collect the data and so a significant increase in cost.. You don't just point your little home dish at the right location and get a signal... (don't get me wrong, that would be great, but the power to generate such a signal would be sadly cost prohibitative). No, you have to collect the data on the big boys and they are not cheap.

      In each and every one of these missions the scientists and engineers have to scale back their desires (not because of any technological problems but) because what they would like to do cannot be done given the funding opportunity. So you cut, scale back, cut some more, scale back again, etc... and eventually you arrive at a proposal that might actually be funded. It's not exactly what you would hope for, but given the opportunity available it's your best bet at a viable mission.

      --
      "Truth is much too complicated to allow anything but approximations"
    2. Re:Can't wait for the video. by jacksonj04 · · Score: 2, Insightful

      What amazes me is that no probes have yet been constructed in orbit, allowing far larger probes to be sent. You could easily send up components, park them near the ISS whilst people go bolt them together, then send it on its way.

      Big camera? No worry. Need huge solar panels? No worry. Send them up piecemeal and build in orbit. Bus sized probes shouldn't be a problem.

      --
      How many people can read hex if only you and dead people can read hex?
  6. Great stuff by Robotron23 · · Score: 5, Interesting

    One of the most intriguing of all the photos is likely the one of the moon Iapetus. While the other photos beautifully capture images of Titan and Saturn itself, the real object of intrigue is the geological formation on Iapetus. Near its equator theres a huge topographic ridge, which gives the moon a really unusual appearance.

    Was anyone else struck by how Titan seems very similar to Mars on its surface shot? Lots of small rocks and boulders laying around its surface and a general haze present etc etc.

    1. Re:Great stuff by Tablizer · · Score: 2, Informative

      Was anyone else struck by how Titan seems very similar to Mars on its surface shot? Lots of small rocks and boulders

      Actually, those "rocks" may be ice chunks according to some experts.

  7. Why Just Pictures? by DanielMarkham · · Score: 2, Interesting

    Seems by now we could have something a little more advanced -- holograms maybe, or at least all images as stereographs. If these robot missions are to take the place of manned exploration as some have indicated, then wouldn't it make sense to do the best you can so that people would feel they were actually there? Even the use of false color bothers me -- do people even know what the real planets look like anymore? Sky and Telescope magazine ran an article last month about how newcomers to astronomy are sometimes dissapointed when they see the real thing! It's because most of the pictures in the mass media have been "enhanced".

    Certifications: Worth It Or Waste Of Time?

    1. Re:Why Just Pictures? by xoboots · · Score: 4, Insightful

      Can you clarify what you mean be "anymore"? Was there ever a time that people knew what the real planets "looked" like? Or even the unreal planets for that matter....most of everything we know is heresay and much of that is colorful heresay, to say the least.

      Best of all, if you really want to know what the planets look like, these "false colored" images are the best thing after all because they pick out features that single sources of original data are obscuring or not picking up at all. It shouldn't be forgotten that this is data imaging, not a family picnic slideshow; the instruments being used to generate the data are not limited to the familiar visible-spectrum light camera that we are used to for our snapshots.

      Still, I'm anxiously awaiting those holographic images you suggested. Now thats a nice enhancement!

  8. Congratulations to all involved by suitepotato · · Score: 3, Insightful

    This looks like a mission very well done thus far and is the sort of thing we should do at every opportunity.

    For the future, I'd like to see us mass-producing multi-use probes and sending small convoys of them out across the system. I'd also like to see more space telescopes sent out and about to capture data to send home. Imagine sending something about half the size of Hubble to orbit between Mars and Jupiter.

    --
    If my grammar and spelling are off, I am [distracted/tired/careless] (take your pick)
  9. rotation by dpille · · Score: 4, Funny

    the planet's rotation seems to be slowing!

    Of course it is. We keep using it to boost our spacecraft.

  10. Coming Soon! by PHAEDRU5 · · Score: 2, Funny

    Texas-sized comet, accidentally knocked off-kilter by NASA probe, hits....

    T E X A S

    !!!!!

    Yeah, baby, yeaaaah!

    --
    668: Neighbour of the Beast
  11. thin atmosphere by haakondahl · · Score: 5, Funny

    Wouldn't that be an atmotorus?

    Yeah, yeah -1 Pedant...

    --
    Don't trust anyone under thirty.
  12. Re:O2 Atmosphere + Water by lhbtubajon · · Score: 5, Insightful

    There were several ways you could have asked that question without being utterly disrepectful, and without sounding like you're lashing out at the world.

    The people you're talking about are hardworking and dedicated people at the forefront of exploration. If the sequence of their efforts at exploration isn't logical to you, consider the possibility that you lack key information fueling your basic assumptions, and frame your question with that in mind.

    Otherwise, it's more difficult for the people who know the answers to cull the question from the troll.

  13. Titan volcano image is cool too by amightywind · · Score: 2, Interesting

    The Titan landscape has proven to be so fantastic I hope NASA considers sending a long lived rover back soon. I think the recent Titan volcano VIMS image belongs on this list.

    --
    an ill wind that blows no good
    1. Re:Titan volcano image is cool too by Iron+Sun · · Score: 2, Informative

      The Solar System Exploration Strategic Roadmap lays out NASA's current plans/wishlist for robotic exploration in the next 20+ years. Basically, they foresee one Discovery class (NEAR, Mars Pathfinder, Deep Impact, etc) mission every two years or so; two or three more expensive New Frontiers missions per decade such as the Pluto New Horizons probe or the newly announced Juno Jupiter Polar Obiter; and one or possibly two $1 billion+ "Flagship" missions. The first flagship mission will be the much delayed Europa Geophysical Orbiter. The second Flagship mission, slated for 2013 or therabouts, will most likely be a Titan Explorer, an RTG-powered blimp to cruise around the surface for an extended period.

      Keep in mind that this is obviously subject to political whim, but it shows that Titan is a really high priority for future exploration.

  14. Cheap planet by AndroidCat · · Score: 5, Interesting
    Imagine a planet losing seven minutes over a couple decades! If they look closely, they'll probably see that it's really a S4turn and God bought a cheap knock-off from a sidewalk vendor.

    They did say that they might not be measuring it right. Still, between the swirly fluid mass of the planet, the moon system, magnetic field and whatnot, if they're correct, it would be interesting to see where Saturn's hiding all the angular momentum.

    --
    One line blog. I hear that they're called Twitters now.
  15. Shades of Niven by adavies42 · · Score: 2, Interesting

    Anyone else read _Integral Trees_?

    --
    Media that can be recorded and distributed can be recorded and distributed.
    -kfg
  16. Re:O2 Atmosphere + Water by frankthechicken · · Score: 3, Funny

    Agreed, I still find it amazing that we can send these probes out into space, take some photographs, send the images back to planet earth and see the beauty of our solar system whilst sitting in a comfy chair.

    I also find it amazing that no matter where we travel nowadays we always find the need to take photographs and there is always one picture with a fingerprint blocking the view.

  17. Best picture not in list, unfortunately by Thagg · · Score: 3, Interesting

    Of the pictures they have to choose from, I have to go for the pic of Iapetus. It's by far the most shocking of the pictures -- the girdling ridge around Iapetus' equator is just too weird to believe.

    But, my favorite Cassini picture is this one, of the rings edge on. Here you can see a perfectly straight line, almost a quarter of a million miles long. Where else in the universe can you see such a thing?

    Thad Beier

    --
    I love Mondays. On a Monday, anything is possible.
  18. rotation problem by shadowbearer · · Score: 3, Insightful

    Just an amateur astronomer, but :)

    My first thought there (+grain_salt) is that Saturn must have suffered a grazing collision with a large body - probably the same one that created the rings - and the dispersion of the rings mass, like the recession of Earth's moon, is having the same effect on Saturn that it does here, slowing rotation. Unlike Earth's moon this would have to be an unstable system.

    Only that seems like a *huge* number, given how fast Saturns' rotation is, and how massive it is *. So the impact must be recent - and it's pretty widely accepted, I gather, that Saturn's rings are very young.

    If that figure for the rotational change is right - is it just the surface winds or something deeper? - then whatever created the rings was *very very* recent?

    * Too tired to do the math, but wouldn't Saturn's low density contribute?

    Cheers,
    SB

    --
    It's old. The more humans I meet, the more I like my cats. At least they are honest.
    1. Re:rotation problem by Tablizer · · Score: 2, Insightful

      IMO, it may have something to do with the different layers or "shells" that make up Saturn. Maybe momentum gets transfered back and forth between layers in a cyclical fashion. It is difficult to give precise rotation numbers because Saturn is a big ball of goop. If you can only obtain clues from a limited part(s) of the goop, then you get only approximate numbers.

      Even Earth's outer rotation speed is slightly different from the core's because the core is molten and can move slightly independant of the harder outer shell. This difference is part of what generates our magnetic field, which can be measured with a drug-store compass.