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BLAST Telescope About To Launch From Antarctica

mtruch writes "BLAST, the Balloon-borne Large Aperture Sub-millimeter Telescope, is about to be launched from McMurdo Station, Antarctica. BLAST is a 2700 kg telescope with a 2 meter primary mirror that hangs from a 1.1 million cubic meter balloon floating at an altitude of 38 km that will study the star formation history of the universe. It will float west at nearly constant latitude for about 14 days until it is (hopefully) located over McMurdo again and will be terminated and recovered. Real time position and flight track is available from the CSBF. Watch the launch live via a crappy webcam link. Three of the graduate students working on the project have photo blogs of much of the prep period, and specifically Don's blog should have launch photos soon (bandwidth to/from McMurdo is at a premium). BLAST made it on Slashdot in the past, when it launched from Sweden in June 2005, and indirectly with an interview with Prof. Barth Netterfield and George Staikos. Yes, the flight computers still run Slack, and yes, we still use kst for data viewing and analysis. There is a Discovery Science show about BLAST and high-altitude balloons, and a future documentary film being made as well."

10 of 51 comments (clear)

  1. Re:editing flaw in the webcam stream... by Xandu · · Score: 2

    Well, the webcam has long been turned off, as the launch was about 12 hours ago. The balloon only takes about 3 hours to get to float (maximum altitude), so it is only a tiny dot the webcam now.

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    --Xandu
  2. Eskimo UFO by Joebert · · Score: 4, Funny

    BLAST is a 2700 kg telescope with a 2 meter primary mirror that hangs from a 1.1 million cubic meter balloon floating at an altitude of 38 km
    What's the odds we'll see this reported as a UFO story on Unsolved Mysteries in a few years ?

    --
    Wanna fight ? Bend over, stick your head up your ass, and fight for air.
    1. Re:Eskimo UFO by twiddlingbits · · Score: 3, Interesting

      Based on what I have seen (on TV) about the ballon missions from the Antartic float in a circle of 3-400 miles circumfrence about the South Pole. Unless penguins have cell phones and have learned to use them I doubt you'll get UFO reports. Even at 38km high (125000 ft) you wouldn't see it from populated areas (New Zealand being the nearest population center) I'm sure there is a formula for how far away you can see something at 125K feet but I don't feel like googling it today.

    2. Re:Eskimo UFO by MaGogue · · Score: 2, Informative

      Uh, for this, you do not need google, but geometry.

      If you extend a line from the centre of the Earth C, r=6500km through the baloon B at h=38km, and another line from the centre to the point A, from where it is theoretically still possible to see the baloon, the line BA is tangential to Earth, therefore ABC is a right angle triangle.

      Pythagoras gives sqr(|AC|)+sqr(|AB|)=sqr(|BC|), since |AC|=r, |BC|=r+h, and our distance x=|AB|, we have

      x=sqrt( (r+h)*(r+h) - r*r)=sqrt( 2*h*r+h*h)
      which because r>>h is approx. sqrt(2*h*r)=sqrt(6500*38*2)=703

      So, its about 700 kilometers, not very far from Antarctic continent. I't not visible from Australia or NZ.

    3. Re:Eskimo UFO by spun · · Score: 2, Funny

      Ha! That's the plan! You see, aliens have been landing at the south pole for years. This is just a way to throw the conspiracy theorists off the trail. The world must know: penguins are actually super-intelligent aliens from the planet fishstickus. It wasn't humans that overfished our oceans, it was the alien penguins. Now you know the truth!

      --
      - None can love freedom heartily, but good men; the rest love not freedom, but license. -- John Milton
  3. And in other news... by tlon · · Score: 5, Funny

    News Flash: Scientists struggle to explain the polar meltdown occurring at the McMurdo Antarctic base. "We've never seen anything like it" commented Don, one of the researchers serving at McMurdo.

    "I posted my pictures to the McMurdo file server, and a few minutes later, the whole thing just started sinking into the ground!" One industry expert attributes the effect to 'The Slashdot Effect'.

    Joe L. Expert commented "With bandwidth at McMurdo at a premium, the sudden onslaught of traffic from a posting to the nerd news site Slashdot.org caused a gigantic power spike. The land lines carrying power and data to the McMurdo facility became superconducting in the ultra-cold temperatures there, and some sort of resonance field appears to have formed." L. Expert went on to say "These scientists may have accidentally discovered a new way to start a fusion reaction. Of course, this reaction can only be shut down if slashdot visitors stop hammering the poor server into the ground. If we don't act quickly, the whole southern icecap may melt, flooding the world and destroying civilization as we know it"

    Joe Expert was forcibly removed from his office a few minutes later by several men in black suits.

  4. I met this guy. by kjones692 · · Score: 3, Interesting

    He gave a lecture at a summer physics program I attended. Really interesting guy, fascinating stuff, but... whatever you do, don't talk to him about the previous BLAST telescope. It also had a two-meter mirror, but this one was made out of glass, (instead of aluminum) cost a million dollars, and shattered on takeoff. He is extremely bitter about this.

    Anyways, best of luck to 'em!

    --

    Love the Third Amendment?
    1. Re:I met this guy. by Xandu · · Score: 4, Informative

      It also had a two-meter mirror, but this one was made out of glass, (instead of aluminum) cost a million dollars, and shattered on takeoff.

      Well, it did have a two-meter mirror, and did cost $1 million. But it was made of carbon-fibre, and did not shatter. Yes, the launch was a little rought, and yes it didn't work perfectly at float, and yes there was damage to it when we recovered. But was that due to takeoff, landing, or both? I'm sure it was a little of both, but how much damage from launch we'll never know.

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      --Xandu
  5. Better link. by Xandu · · Score: 4, Informative

    Since the webcam is off (and slashdot couldn't link to it anyway), here's a link of a small movie (taken with a small digital camera) of the launch. It's from Don's blog, which covers the entire campaign.

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    --Xandu
    1. Re:Better link. by Rorschach1 · · Score: 2, Interesting

      Anyone interested in this sort of thing should also check out sites like ARHAB and EOSS. High-altitude ballooning has gained a lot of popularity in recent years, especially among ham radio hobbyists. It's relatively easy to build a payload that can reach an altitude of over 20 miles. I finally built one myself and launched it last month - it reached an altitude of over 106,000 feet and took over a thousand pictures between takeoff and landing. I posted a writeup on my website.

      Basic payloads like mine don't really contribute much scientific knowledge, but they're a lot of fun and it's a good way to get kids interested in science. It's the closest thing to launching a satellite you're likely to get on a shoestring budget. For the record, my launch probably cost around $400, and everything but the balloon ($65) and helium (about $40) was recovered in reusable condition. Though I'll probably shell out another $8 for a new payload housing - the last one hit a dry lake bed at around 20-30 mph when the 'chute got tangled.