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Spitzer's 5-Gigapixel Milky Way

James Harold writes "Today NASA unveiled a new infrared mosaic of our galaxy. The result of over 800,000 individual images collected by the Spitzer Space Telescope, it is the largest, highest-resolution, and most sensitive infrared picture ever taken of the Milky Way (and will likely remain so for the foreseeable future). Because Spitzer sees in infrared, it penetrates much farther into the galaxy, revealing previously hidden star clusters, star-forming regions, shocked gases, glowing 'bubbles' and more. The complete mosaic is about 400,000 by 13,000 pixels, and a 180' printed version is being shown at the American Astronomical Society meeting in St. Louis. A zoomable, annotated version of two different variants on the image (as well as some additional information on the science) is available at Alien Earths, a NASA- and NSF-supported education site." The Spitzer survey is already causing a stir potentially bigger than that raised when Pluto was deemed not a planet: two minor spiral arms of the Milky Way may be demoted.

29 of 124 comments (clear)

  1. Compression at it's finest by nexeruza · · Score: 5, Insightful

    Wow they took a 400,000 by 13,000 pixel image and compressed it to a 200x200 jpeg to wow us net folks, stellar.

    1. Re:Compression at it's finest by mrbluze · · Score: 5, Informative

      Here are some hi-res images - found them finally.

      --
      Do it yourself, because no one else will do it yourself. [beta blockade 10-17 Feb]
    2. Re:Compression at it's finest by icegreentea · · Score: 4, Informative

      On the NASA site (first link), hit the visual button at the bottom of the screen. You'll be sent to http://www.spitzer.caltech.edu/Media/releases/ssc2008-11/visuals.shtml

      You can download 3000*2400 versions of each mosaic, or download each individual tile (16 in total) at insane resolution. Enjoy.

    3. Re:Compression at it's finest by pgn674 · · Score: 4, Informative

      Here's a link to the zoomable explorer mentioned in the summary: http://www.alienearths.org/glimpse/

    4. Re:Compression at it's finest by dotancohen · · Score: 5, Funny

      That's what I was thinking. Where's the beef? Are you kidding? I was scared to click the link to TFA thinking it might try to download to whole thing.
      --
      It is dangerous to be right when the government is wrong.
    5. Re:Compression at it's finest by tuxgeek · · Score: 4, Informative

      Alien Earths has some pretty good images of this thing
      http://www.alienearths.org/glimpse/
      The viewer is pretty slick

      --
      "Suppose you were an idiot...and suppose you were a member of Congress...but I repeat myself." Mark Twain
    6. Re:Compression at it's finest by vrmlguy · · Score: 4, Interesting

      Here is a concatenation of all the screen resolution images into a single 14400x492 image: http://samwyse.googlepages.com/ssc2008-11b_medium.jpg

      BTW, I created them from the caltech screen-res images using this Python script:

      from PIL import Image
      full = Image.new('RGB', (16*900, 492))
      for i in range(16):
              piece = Image.open('ssc2008-11b%d_medium.jpg' % (i+1))
              full.paste(piece, (i*900, 0))
      full.save('ssc2008-11b_medium.jpg')

      --
      Nothing for 6-digit uids?
  2. Bigger than Pluto? by nebaz · · Score: 4, Insightful

    The average lay person is not going to care about the status of spiral arms in the galaxy. Everybody learned that Pluto was a planet in grade school. That fact gives the average person a stake in its status. When you ask about a spiral arm, you'll hear "huh?".

    --
    Rhymes that keep their secrets will unfold behind the clouds.There upon the rainbow is the answer to a neverending story
    1. Re:Bigger than Pluto? by Concerned+Onlooker · · Score: 2, Funny

      And anyway, it's just the unfashionable end of the western spiral arm of the galaxy.

      --
      http://www.rootstrikers.org/
    2. Re:Bigger than Pluto? by Tablizer · · Score: 3, Informative

      The Milky Way may resemble M83: a barred-spiral with 2 main arms and other less distinct sub-arms:

      http://www.eso.org/projects/vlti/instru/prima/images/image13.jpg

  3. Accessibility by Anonymous Coward · · Score: 3, Interesting

    If this information is owned by the government, it should be free to the citizens, and hence free to google sky, or the other alternatives. Why doesn't this immediately go that direction?

    I understand Google Earth/etc. being bound by paying terrestrial satellite owners for photos, but I would think NASA could get better public support if they were more available in the sky.

    1. Re:Accessibility by wass · · Score: 4, Informative

      I believe all NASA (and I believe US govt funded) astronomical research data that isn't classified is eventually put into the public domain. Eg, all HST data.

      But every mission and every observation has a PI and a team of researchers that have proposed that project, have done a huge amount of homework on why they chose the targets they did, what they hope to observe, and how they will do analysis. The PI's of the project are thereby given exclusive access to their data for a period of time. IIRC, for Hubble it's one year.

      This period of exclusivity is to allow them to get the credit for their hard work in choosing the observation, and to prevent being scooped by fellow academics. It's like a very short-lived patent of sorts.

      IMHO, a period of one year for astro data is a perfectly valid way to satisfy all parties involved. It also puts pressure on the researchers to get their asses in gear and publish, before someone can get at their data. But it lets everybody else use the data for their own purposes after the expiry date.

      Of course there is the question of the data storage and retrieval service, and all the calibrations that need to be done on the raw data, and the effective HOWTO procedures for such calibration. Much of this is available, and for active projects there are help desks. Eg, for each of the sensors on the HST there is a specific help desk to provide assistance explaining how to get and process the data. But for older missions, there are no funds to provide these services. But the data should be there, somewhere. But you're probably on your own to calibrate it properly (or at least find older users of said data that can help you).

      --

      make world, not war

    2. Re:Accessibility by astrobabe · · Score: 2, Informative

      As a member of the MIPSGAL team, I'd like to point out that all the data used for the huge image has been public since it was processed. Whilst standard observing programs have a proprietary period of 1 yr (so the PI can get the science done that he designed the observations around), the Legacy programs such as GLIMPSE and MIPSGAL has a zero proprietary period. Legacy programs are selected on their ability to influence astronomy as a whole and provide data which may have additional uses (like I'm actually doing a secondary asteroid survey based on large quantity of data in galactic plane surveys).

  4. Link to AliensEarths, mentioned in article by sheriff_cahill · · Score: 5, Informative

    http://www.alienearths.org/glimpse/glimpse.php and launching the viewer will bring up the zoomable image mentioned

  5. Link by phantomcircuit · · Score: 2, Informative

    The image is here. Yet again great editing.

  6. Direct link to the huge images by Lord+Juan · · Score: 5, Informative

    But, the images (the huge ones) are right there, here is the direct link to the huge images http://www.spitzer.caltech.edu/Media/releases/ssc2008-11/ssc2008-11a.shtml

  7. Of Tags and Men by arnoldo.j.nunez · · Score: 4, Funny

    Okay, I realize the tag says !eliot, but when the summary says: Spitzer, penetrates, revealed, and shocked, it makes me think that Slashdot is trying to embed secret messages in TFS.

  8. deep penetration by liquidf · · Score: 5, Funny

    Because Spitzer sees in infrared, it penetrates much farther into the galaxy... wow, never thought i would see "Spitzer" and "penetrate" in the same sentance together and *not* be talking about a certain governor
    --
    i've had just about enough of your vassar bashing.
  9. Re:really? by mrbluze · · Score: 5, Funny

    You were really planning to click on a link pointing to a 20 gigabyte image? Then what?
    • Start downloading
    • Go out for coffee
    • Start missing slashdot
    • Drink more coffee
    • Come home
    • Cancel download
    • Continue browsing/posting on slashdot.
    --
    Do it yourself, because no one else will do it yourself. [beta blockade 10-17 Feb]
  10. damn iso. by bronney · · Score: 2, Funny

    well they should've shot it in low iso, those damn ccd noise is unbearable

  11. Misleading Title by Anonymous Coward · · Score: 2, Funny

    And here I was thinking I was gonna see hi-res pictures of Eliot's whore with his jizz on it...

  12. Re:really? by Anonymous Coward · · Score: 3, Funny
    • ???
    • profit
  13. Re:really? by mrbluze · · Score: 3, Funny

    I was more interested in what would happen after he got the image onto the hard drive: Well, on a HD display of 1920x1200, you can potentially generate 2000 backgrounds. Cool huh?
    --
    Do it yourself, because no one else will do it yourself. [beta blockade 10-17 Feb]
  14. Re:And the winning viewer is... by Tatisimo · · Score: 2, Informative

    It's working fine for me on GQview, on Xubuntu. Konqueror loads it up fine, too. I didn't even try to open it on firefox; I know the image viewing on it sucks! For viewing images on a browser on my windows system, I use K-Meleon. I've often wondered why firefox won't add that handy little advanced zoom in/out feature!

    --
    Give Kashyyyk back to the Wookies
  15. Re:And the winning viewer is... by dotancohen · · Score: 2, Informative

    IE, MSPaint, Firefox, and a trusty little shareware image editor I use--they all choked on the first hi-res image Eye Of Gnome opens them just fine. It's a great little program, and as a KDE user it's the only Gnome app that I use as a default. I didn't even try anything else yet.
    --
    It is dangerous to be right when the government is wrong.
  16. Re:And the winning viewer is... by MadnessASAP · · Score: 3, Informative

    IrfanView worked fine for me, but be warned the Images are ~1gb of raw data each so if you don't have at least 1.5GB of RAM your computers going to be hurting on these.

    --
    I may agree with what you say, but I will defend to the death your right to face the consequences of saying it.
  17. Re:really? by Slorv · · Score: 2, Interesting

    It really isn't that extra.
    We have no problem printing 20k pixels wide images. Our now rather old HP printer only print 106 cm but prints can be as long as the paper rolls allow.
    At 200 px/inch the print will be 2,5 meters - really nothing fancy.
    I do a couple of prints like that every month.

    However, the cost of black ink for a picture of the night sky, that will hurt a bit.

    --
    Bikers.....The only people that understand why a dog hangs his head out a car window.
  18. One arm, OK. But TWO??!!! by hyades1 · · Score: 3, Funny

    "two minor spiral arms of the Milky Way may be demoted."

    I suspected something like this might happen, I just didn't dream that they'd go so far.

    I mean, you have to be just a little suspicious about whether all star-forming arms are on an equal footing when you look at the names. There's Perseus and Sagittarius. Then we get to Scutum-Centaurus, and you have to wonder if the astronomers needed a leg up in the imagination department. And then all doubt vanishes when we get to the fourth arm...Norma. Yes, Norma. Like the girl who couldn't wait to get old enough to disown her parents, legally change her name to Chantal and get a job at the brass-pole ballet.

    You just had to know they were having their doubts about arm number 4.

    On a more positive note, the same bunch of guys who just slammed Scutum-Centaurus and, um, "Norma", are also telling us that they "obtained detailed information about our galaxy's bar, and found that it extends farther out from the centre of the galaxy than previously thought".

    A bar that's closer to the house than you thought can't be a bad thing. Especially when you need to walk home.

    --
    I've calculated my velocity with such exquisite precision that I have no idea where I am.
  19. Re:really? by Hognoxious · · Score: 4, Funny

    Next time maybe they'll take the picture during the day.

    --
    Confucius say, "Find worm in apple - bad. Find half a worm - worse."