Space Never Fails to Blow My Mind, 2nd Edition

Discussion in 'The Mainboard' started by Bruce Wayne, Apr 13, 2015.

  1. beerme

    beerme Well-Known Member
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  2. Joe Withabee

    Joe Withabee PS I have sifulus
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    It’s real, unfortunately
     
  3. Mr Bulldops

    Mr Bulldops If you’re juiceless, you’re useless
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    Where did you see that it’s real? That can’t be real
     
  4. Joe Withabee

    Joe Withabee PS I have sifulus
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    Jesus fucking Christ, guys
     
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  5. Mr Bulldops

    Mr Bulldops If you’re juiceless, you’re useless
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    Hey, this has been delayed so many times that I’ve been expecting a final full punch to the dick from this at any moment. That would have been it
     
    #3355 Mr Bulldops, Dec 26, 2021
    Last edited: Dec 26, 2021
  6. Shinzonᴵᴵ

    Shinzonᴵᴵ °°°°
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    Link please!
     
  7. WhiskeyDelta

    WhiskeyDelta Well-Known Member
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    Guys it’s a persistent stare infrared camera. Even if they HAD left that on the lense the size of a car, it wouldn’t look like that.
     
  8. TableKnight

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    It's probably 20% in the metric system or some nerd shit

    /s
     
  9. Henry Blake

    Henry Blake No Springsteen is leaving this house!
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    https://blogs.nasa.gov/webb/2021/12...d-to-know-about-webbs-mid-course-corrections/
     
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  10. Shinzonᴵᴵ

    Shinzonᴵᴵ °°°°
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    Dinosaurs had about a 165 million-year run on Earth. Hammering the under for humans.

     
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  11. WhiskeyDelta

    WhiskeyDelta Well-Known Member
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    Birds still kickin so dinosaurs still kickin.
     
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  12. southlick

    southlick "Better Than You"
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  13. CUAngler

    CUAngler Royale with Cheese
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  14. Shinzonᴵᴵ

    Shinzonᴵᴵ °°°°
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    Lol jk. But yeah yeah invertebrates, sharks, alligators, crocodiles, birds, fish, and so on and so on. Instead of just saying dinosaurs as most people would think of them, especially reading a passing post, everyone should specify they’re referring exclusively to the mass extinction of prehistoric non-avian reptiles. :raptorjesus:
     
    #3364 Shinzonᴵᴵ, Dec 27, 2021
    Last edited: Dec 27, 2021
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  15. Bo Pelinis

    Bo Pelinis Will Smith just smacked the shit outta me!
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    Birds evolved from dinosaurs, though.
     
  16. Shinzonᴵᴵ

    Shinzonᴵᴵ °°°°
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    Yep I know. Covered that in the post you quoted.
     
  17. Bo Pelinis

    Bo Pelinis Will Smith just smacked the shit outta me!
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    You didn’t though.
     
  18. Shinzonᴵᴵ

    Shinzonᴵᴵ °°°°
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    Acknowledging WhiskeyDelta was right. And clarifying that “dinosaurs” didn’t go extinct. But just the prehistoric non-avian reptiles. Sorry if it wasn’t as obvious as it needed to be.
     
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  19. southlick

    southlick "Better Than You"
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  20. southlick

    southlick "Better Than You"
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  21. WC

    WC Bad Company, ‘til the day I die.
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  22. beerme

    beerme Well-Known Member
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    well that was unexpectedly good news
     
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  23. TableKnight

    TableKnight Go Knights
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    So what happens when it runs out of fuel? Obviously the equipment is powered by solor, so does it just lose course out of L2 and drift off into the solar system?
     
  24. BamaNug

    BamaNug Half is a lie, but the good part's true
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    Don't worry, the planet we still reside on is currently engulfed in flames. You'll get bad news soon enough.
     
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  25. WC

    WC Bad Company, ‘til the day I die.
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    and a helluva flex by nasa. “Due to our own genius this massive technological advancement is even better than you thought”
     
  26. beerme

    beerme Well-Known Member
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    I listened to the star talk podcast on it and they said l it will just be non functioning in L2 until we can possibly repair / refuel it but I could be wrong
     
  27. TableKnight

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    Just read some about it. L2 is not a completely stable orbit. Every 21 days it will need to do a 1-2 m/s deltaV. Once we are out of fuel it will slowly move out of L2.
     
  28. Henry Blake

    Henry Blake No Springsteen is leaving this house!
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    From that blog https://blogs.nasa.gov/webb/2021/12...d-to-know-about-webbs-mid-course-corrections/

    I think they always want to stay on the short side so that they're always pushing it away from Earth. I guess it would eventually float back toward Earth if it ran out of fuel?

    "One interesting aspect of the Webb launch and the Mid-Course Corrections is that we always “aim a little bit low.” The L2 point and Webb’s loose orbit around it are only semi-stable. In the radial direction (along the Sun-Earth line), there is an equilibrium point where in principle it would take no thrust to remain in position; however, that point is not stable. If Webb drifted a little bit toward Earth, it would continue (in the absence of corrective thrust) to drift ever closer; if it drifted a little bit away from Earth, it would continue to drift farther away. Webb has thrusters only on the warm, Sun-facing side of the observatory. We would not want the hot thrusters to contaminate the cold side of the observatory with unwanted heat or with rocket exhaust that could condense on the cold optics. This means the thrusters can only push Webb away from the Sun, not back toward the Sun (and Earth). We thus design the launch insertion and the MCCs to always keep us on the uphill side of the gravitational potential, we never want to go over the crest – and drift away downhill on the other side, with no ability to come back."
     
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  29. beerme

    beerme Well-Known Member
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    woah that’s pretty nuts
     
  30. Emma

    Emma Words
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  31. southlick

    southlick "Better Than You"
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  32. Emma

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    From the NASA media teleconference JWST update this morning -

    Summary:
    • 'Everything so far is looking great'!
    • Still trying to 'get to know' Webb
    Two concerns over last few days, now fixed:
    • Solar arrays were not operating as well as expected. Now corrected, everything's 'nominal', power has increased. Now, no issues with power.
    • Sunshield motor temperatures higher than expected. Re-pointed Webb to allow motors to cool more. Now being used to tension sunshield.
    • Observatory was never in danger
    Sunshield tensioning
    • 'The next big challenge'.
    • Today tensioning of sunshield layer 1 begins! Will take 'most of the day'. To tension all layers will take 2-3 days. Will go cautiously, don't want to burn out the team. Probably will finish on wednesday.
    • Surprise at how well the deployment telemetry has matched expectations so far
    • 6 motors involved in tensioning all 5 layers. Can pause at any time if issues arise. Designed to be snag-free. Expect to have smooth-sailing. Currently in the pre-activities phase, layer 1 tensioning likely to start in a few hours.
    • When all five layers are tensioned, 70-75% of the 344 single point failures will be passed
    Future
    • Probably 'by end of week', will be deploying secondary mirror.
    • Fuel savings from near-perfect launch & burns: lifetime now 'a lot more than 10 years' (no precise lifetime length yet though)
     
  33. Gallant Knight

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    I’m ready to meet some aliens
     
  34. infected donkey

    infected donkey Arkansas Razorbacks
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    Don't lie you just want to be anal probed again!
     
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  35. Gallant Knight

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    I can do that whenever I want daddi
     
  36. TableKnight

    TableKnight Go Knights
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    Temperatures on the Sun/hot side of the sunshield will reach a maximum of approximately 383K or approximately 230 degrees F and on the cold mirror/instruments side of the sunshield, a minimum of approximately 36K or around -394 degrees F. Due to the engineering of the sunshield, this incredible transition takes place across a distance of approximately six feet.
     
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  37. Heavy Mental

    Heavy Mental non serviam
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    Wow, so a ~630 degree swing in 6 feet, to protect the instrumentation? Wild.
     
  38. WhiskeyDelta

    WhiskeyDelta Well-Known Member
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    Vacuum is a hell of an insulator.
     
  39. CUAngler

    CUAngler Royale with Cheese
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    pfftttt my yeti mug can do this
     
  40. TableKnight

    TableKnight Go Knights
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  41. Emma

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    Officially a telescope and able to collect data as long as the L2 insertion goes smoothly
     
  42. Kirk Fogg

    Kirk Fogg "Tell them what they've won Olmec!"
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    Thats what she said
     
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  43. Henry Blake

    Henry Blake No Springsteen is leaving this house!
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  44. TableKnight

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    It's - 394 degrees, and they still need a separate heat sink on some equipment!
     
  45. Joe Withabee

    Joe Withabee PS I have sifulus
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    Right now it’s traveling at 989 mph and falling. 14 days and 273k miles until L2 insertion
     
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