Results 1 to 14 of 14

Thread: Chang’e 4 doing great on the far side of the moon

  1. #1
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Chang’e 4 doing great on the far side of the moon

    It takes two week naps waiting for the sun. It’s in a crater that’s 180 km across and 13 km deep.


    https://www.space.com/moon-far-side-...-4-photos.html

    China's Chang'e-4 mission has completed eight full days of science work on the far side of the moon — and in between the experiments, the lander and rover have sent home some new photographs, too.

    The mission touched down in early January, becoming the first robotic mission to land on the far side of the moon. Here, days and nights each last the equivalent of about two weeks on Earth, and the nights are brutally cold.


  2. #2
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon

    China's Chang'e-4 lander as seen on the moon in a photograph released on July 9.China's Chang'e-4 lander as seen on the moon in a photograph released on July 9.(Image: © China Lunar Exploration Project)



  3. #3
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon

    During it’s two week night the temps get down to - 310 F


  4. #4
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon


  5. #5
    Join Date
    Mar 2006
    Location
    West Sacramento, CA
    Posts
    6,764

    Default Re: Chang’e 4 doing great on the far side of the moon

    It’s in a crater that’s 180 km across and 13 km deep.
    Should there be a decimal point in there, between the one and the three? Thirteen kilometers is almost forty-three-thousand feet.
    sproing


  6. #6
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon

    Quote Originally Posted by Jim Mahan View Post
    Should there be a decimal point in there, between the one and the three? Thirteen kilometers is almost forty-three-thousand feet.
    Good point, that’s what Wikipedia says but maybe that’s mountain top to bottom?
    Yeah, looking at this map it seems the lowest to highest distance at the rim is 7km.

    https://www.hou.usra.edu/meetings/lp...oster/1320.pdf

    Found this

    http://www.psrd.hawaii.edu/CosmoSpar...manCrater.html

    In the larger scope, could analyses of samples from Von Kármán crater eventually help constrain the age of SPA basin, and more broadly, basin formation chronology? The answer is a hopeful yes, as researchers think the 4.84-kilometer-deep crater could have excavated rocks melted during the huge event that formed the SPA basin. Hence, the anticipated, new in situ studies of Von Kármán crater could reveal whether we have found appropriate samples for a sample-return mission to allow dating of SPA basin.
    Last edited by LeeG; 08-16-2019 at 12:47 PM.

  7. #7
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon


  8. #8
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon

    Dunes in Von Karman crater ON Mars.....I got lost.

    https://www.uahirise.org/ESP_029859_1160

    Last edited by LeeG; 08-16-2019 at 03:58 PM.

  9. #9
    Join Date
    Mar 2011
    Location
    55.878927°N 3.971414°W
    Posts
    2,498

    Default Re: Chang’e 4 doing great on the far side of the moon

    Uh, Lee ... that last one is Von Karman crater on Mars. You need a gas or liquid for dunes like that.

    Andy
    "We were schooner-rigged and rakish, with a long and lissome hull ..."

  10. #10
    Join Date
    Mar 2006
    Location
    West Sacramento, CA
    Posts
    6,764

    Default Re: Chang’e 4 doing great on the far side of the moon

    Amazing imagery. The dark bits in the last one look like shrubbery. With no wind and water weathering, so no Earth type erosion, the dark bits are just as they fell as debris from some ancient crater-making impact. The light stuff underneath definitely has the look of something fluid having flowed over it leaving it rippled like a streambed or wind drifted dunes, before the dark stuff settled.
    sproing


  11. #11
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon

    Quote Originally Posted by AndyG View Post
    Uh, Lee ... that last one is Von Karman crater on Mars. You need a gas or liquid for dunes like that.

    Andy
    oh damnit, thx

  12. #12
    Join Date
    Mar 2011
    Location
    55.878927°N 3.971414°W
    Posts
    2,498

    Default Re: Chang’e 4 doing great on the far side of the moon

    Jim, the white is frozen CO2, overlying dark basalt sands. It's sublimed away on the sunnier slopes, leaving the sand visible. That said, there are seasonal, small, localised geysers blowing sand and dust onto some areas - the more greyish dustings.

    Best bit? The geysers are jetting CO2 and water, which, in tiny pockets, can be liquid and allow a microclimate for any extant biology.

    Which would be good.

    Andy
    "We were schooner-rigged and rakish, with a long and lissome hull ..."

  13. #13
    Join Date
    May 2002
    Location
    MD
    Posts
    53,118

    Default Re: Chang’e 4 doing great on the far side of the moon

    Ok Andy, thx again.

    https://qz.com/1512859/change-4s-moo...-this-martian/

    China’s Moon landing site is a crater named for this “Martian” scientist
    By Echo HuangJanuary 2, 2019

    Von Kármán was among five Hungarian-origin scientists dubbed the “visitors from Mars” by Fritz Houtermans, a physicist who knew them in the 1930s, because of their extraordinary impact on physics and chemistry in the 20th century. The story of the group is also the story of how immigrants helped the US dominate science at a crucial time, Chemistry Nobel laureate Roald Hoffmann commented on a 2006 book about them, Martians of Science.

    To honor von Kármán, a crater on the Moon has shared his name since 1970, and one on Mars is also named after him.

  14. #14
    Join Date
    Mar 2006
    Location
    West Sacramento, CA
    Posts
    6,764

    Default Re: Chang’e 4 doing great on the far side of the moon

    I was inspired, so I spent all afternoon, or the last five minutes, 'creating' this image. I call it 'Woman with seashell, at Von Karman's Mars crater.'

    sproing


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •