Author Topic: Lunar Features - channels, cooling cracks, pits, domes  (Read 101565 times)

Caro

  • IOTW posters
  • Sr. Member
  • *
  • Posts: 341
Re: Lunar Features - channels, pits, domes
« Reply #45 on: April 24, 2010, 07:08:48 am »


Er, channel, chain ...? ;D

jules

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 3478
Re: Lunar Features - channels, pits, domes
« Reply #46 on: April 29, 2010, 06:38:11 pm »
Ridge, cliff, rille?


Off to locate it on a detailed map. Back soon. Somewhere in the sea of Crises.

Thomas J

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 980
  • Do the best you can, while you can
Re: Lunar Features - channels, pits, domes
« Reply #47 on: April 29, 2010, 06:49:09 pm »
Wel, it's certainly a raised feature and quite high too.  :)

Thomas J

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 980
  • Do the best you can, while you can
Re: Lunar Features - channels, pits, domes
« Reply #48 on: April 29, 2010, 06:59:59 pm »


Er, channel, chain ...? ;D
Caro, one way to understand what you see is to locate the diection of sunlight. If you look at the crater to the lower left of the image you will notice the left side of the crater is in darkness. This means that the light is coming from the left, illuminating the right inner wall of the crater leaving the left wall in darkness. Looking at the large feature you will notice the shadow is on the other side suggesting this is a raised feature.
« Last Edit: April 29, 2010, 07:03:38 pm by Thomas J »

jules

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 3478
Re: Lunar Features - channels, pits, domes
« Reply #49 on: April 29, 2010, 07:05:43 pm »
Ridge, cliff, rille?


Off to locate it on a detailed map. Back soon. Somewhere in the sea of Crises.

Well there is a wrinkle ridge around where the locator pin is on My Moon map so it could be that. Here's another example.
« Last Edit: April 29, 2010, 07:07:45 pm by jules »

Caro

  • IOTW posters
  • Sr. Member
  • *
  • Posts: 341
Re: Lunar Features - channels, pits, domes
« Reply #50 on: May 12, 2010, 07:35:48 pm »

jules

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 3478
Re: Lunar Features - channels, pits, domes
« Reply #51 on: May 12, 2010, 08:02:05 pm »
Whatever it is it certainly attracts boulders! But I'm having difficulty telling where they are coming from. Think I'll copy this one over to the Team Area.

jules

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 3478
Re: Lunar Features - channels, pits, domes
« Reply #52 on: May 12, 2010, 08:34:12 pm »

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Lunar Features - channels, pits, domes
« Reply #53 on: May 12, 2010, 11:33:28 pm »
Sharp Lunar Peaks Look at the shadows for size and shape


http://moonzoo.s3.amazonaws.com/v10/slices/000035917.jpg

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Lunar Features - channels, pits, domes
« Reply #54 on: May 12, 2010, 11:35:18 pm »

http://moonzoo.s3.amazonaws.com/v10/slices/000108735.jpg

I'm confused. What is this?

Looks like a boulder filled valley to me.

Caro

  • IOTW posters
  • Sr. Member
  • *
  • Posts: 341
Re: Lunar Features - channels, pits, domes
« Reply #55 on: May 13, 2010, 08:28:41 am »

IreneAnt

  • Science Team
  • Sr. Member
  • *****
  • Posts: 296
Re: Lunar Features - channels, pits, domes
« Reply #56 on: May 15, 2010, 04:23:18 am »
I think these may be cracks.

http://moonzoo.s3.amazonaws.com/v10/slices/000116691.jpg

Wow, cool. As a first guess, I'd say those look like cooling cracks in impact melt ponds.

IreneAnt

  • Science Team
  • Sr. Member
  • *****
  • Posts: 296
Re: Lunar Features - channels, pits, domes
« Reply #57 on: May 15, 2010, 05:21:11 am »
Check out the large, decidedly non-circular depression to the right of centre here. Illumination is from the left, so this is definitely a pit and not a hill.
Coordinates are
    Longitude: 312.475
    Latitude: 23.5332
The image is from the floor of Aristarchus crater, near the central peaks. Aristarchus is a fresh impact crater in Oceanus Procellarum.

http://moonzoo.s3.amazonaws.com/v10/slices/000352601.jpg

Okay, I managed to track down the full image in the LROC WMS Browser. (I have posted instructions on how to do this in the LRO Resources thread, if anyone is interested in trying it.) The orientation of this image at the LROC WMS Browser is flipped compared to what we're using at MoonZoo. So, here is a reoriented screen cap of the region. The yellow box shows the location of the original MoonZoo image.


As you can see, the original depression is just one of many linear depressions in this region. My guess is that these are all cooling fractures in the melt sheet on the floor of the crater. In any case, they seem to be related to the mound, which is, I think, part of the central peak complex. So maybe this mound contributed to the formation of the fractures, possibly by affecting the cooling gradient in the nearby melt?

In any case, neat stuff!

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Lunar Features - channels, pits, domes
« Reply #58 on: May 15, 2010, 07:59:34 am »
That pit might be a possible good site for a future Lunar habitation.

Hofi

  • Newbie
  • *
  • Posts: 29
  • VISIT: http://hidden-space.at.tf
Re: Lunar Features - channels, pits, domes
« Reply #59 on: May 15, 2010, 10:50:54 am »

Longitude: 23.5394
Latitude: 0.366735