Parker solar probe nears launch: Heavy lifting imminent.

Posted: August 11, 2018 by tallbloke in Celestial Mechanics, Solar physics, solar system dynamics

The Parker solar probe is headed for space tomorrow. Best of luck to the mission team.

Comments
  1. tallbloke says:

  2. tallbloke says:

  3. tallbloke says:

    The Probe was originally scheduled to launch on Saturday, but the launch was scrubbed after an issue with the rocket’s helium system arose, Space.com reports.

    If you do sleep through it, don’t worry: We’ll post a link to the replay here at VOX.

    When you’re watching the launch, you might contemplate the amazing fact that it takes a more powerful rocket to get to the sun than it does to get to Pluto. That’s because “any object launched from Earth starts out traveling around the Sun at the same speed as Earth — about 18.5 miles per second — so an object has to travel incredibly quickly to counteract that momentum, change direction, and go near the Sun,” NASA explains.

  4. oldbrew says:

    On its way.

    NASA’S PARKER SOLAR PROBE AND THE CURIOUS CASE OF THE HOT CORONA
    https://www.astrobio.net/also-in-news/nasas-parker-solar-probe-and-the-curious-case-of-the-hot-corona/
    – – –
    Magnetic fields around a planet or a star can overpower the zonal jets that affect atmospheric circulation.

    New research by a Lawrence Livermore National Laboratory (LLNL) scientist and a collaborator from the Australian National University (ANU) provides a theoretical explanation for why self-organized fluid flows called zonal jets or “zonal flows” can be suppressed by the presence of a magnetic field.

    https://www.astrobio.net/also-in-news/magnetic-fields-impact-atmospheric-circulation-of-gas-giant-planets/

  5. tallbloke says:

    More on the conundrum of the hot corona and cool photosphere at this interesting blog

  6. tallbloke says:

  7. ferdberple says:

    I want to know what happened to the heavy elements that shoulg have collected at the sun’s core during the solar system formation.

    It makes no sense that the sun have a hydrogen core.

    Is the sun spinning fast enough to overcome gravity and eject the heavy elements. If so why are the light elements also ejected.

  8. ferdberple says:

    For example. We have naturally occurring uranium reactors on earth. It seems very likely that gravity would cause much greater amounts of uranium to have collected at the suns core during solar system formation. This uranium would today be hard to detect at the suns surface except by the presence of lighter elements created by radioactive decay.

  9. ferdberple says:

    As a side note I came across bharat radiation. Worth a google.

  10. oldbrew says:

    Astronomers saw the first mass eruption from a star that’s not the sun

    The coronal mass ejection was as massive as scientists expected, but less energetic
    BY LISA GROSSMAN 9:00AM, AUGUST 7, 2018

    https://www.sciencenews.org/article/astronomers-saw-first-mass-eruption-star-not-sun
    – – –
    A CME in the direction of the Parker probe would be interesting.

  11. oldbrew says:

    Lubos Motl writes:
    If I could bet that the probe will be dysfunctional after the first approach to the Sun at those 6 million kilometers, I would probably make the bet.

    But I want to be wrong. Good luck, Parker space probe.

    https://motls.blogspot.com/2018/08/parker-solar-probe-will-touch-sun.html

    We shall see 😐

  12. oldbrew says:

    A Cool Solar Mystery

    February 20, 2007: One pole of the sun is cooler than the other. That’s the surprising conclusion announced today by scientists who have been analyzing data from the ESA-NASA Ulysses spacecraft.
    . . .
    According to SWICS, the average temperature of the sun’s polar wind is about one million degrees C. But over one pole the wind is about 80,000 degrees cooler than over the other pole.
    . . .
    “The sun’s magnetic poles have reversed polarity since the 1994 flyby—an effect of the 11-year sunspot cycle,” notes Posner. Lo and behold, “the temperature asymmetry has also reversed. So it appears to be a magnetic phenomenon.”

    https://science.nasa.gov/science-news/science-at-nasa/2007/20feb_coolmystery/

  13. oldbrew says:

    Scientists Successfully Predicted the Shape of the Solar Corona
    August 31, 2018

    Now, solar physicists have shown August 27th in Nature Astronomy that they can accurately predict the appearance of the corona one week in advance — an important milestone on the path to predicting the oncoming solar wind.

    https://www.skyandtelescope.com/astronomy-news/scientists-successfully-predicted-solar-corona-shape/
    – – –
    Article | Published: 27 August 2018

    Predicting the corona for the 21 August 2017 total solar eclipse
    https://www.nature.com/articles/s41550-018-0562-5

  14. oldbrew says:

    A RADIO TRANSMISSION FROM THE SUN:
    The Parker Solar Probe has just radioed NASA with good news. The spacecraft survived its close approach to the sun on Nov. 5th. Because the sun is a giant natural source of broadband radio noise, Parker cannot transmit complicated data streams through the interference. Images and data won’t arrive until early December when the probe has reached a sufficient distance from the sun again. For now, mission controllers are happy to have received a simple beacon saying the spacecraft is okay.
    . . .
    Mission controllers at the Johns Hopkins University Applied Physics Lab received the status beacon at 4:46 p.m. EST on Nov. 7, 2018. It indicated, simply, “A” — the best of all four possible status signals

    http://spaceweather.com/archive.php [9 Nov. 2018]
    – – –
    But it’s a deep solar minimum and all the sunspots have disappeared 😐

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