Author Topic: Crater Questions  (Read 174360 times)

Caro

  • IOTW posters
  • Sr. Member
  • *
  • Posts: 341
Re: Crater Questions
« Reply #90 on: May 31, 2010, 03:31:46 pm »

ID: AMZ4001i2t
Latitude: -1.40139°
Longitude: 56.3893°

I'm guessing an angled impact.  :)
« Last Edit: May 31, 2010, 03:33:17 pm by Caro »

jules

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 3478
Re: Crater Questions
« Reply #91 on: May 31, 2010, 03:40:57 pm »
The crater itself looks quite circular. I wonder what caused that gap. :-\  Do you have the Product ID strip ref (and location of your image on it) Caro? For the insatiably curious..... ::)

Caro

  • IOTW posters
  • Sr. Member
  • *
  • Posts: 341
Re: Crater Questions
« Reply #92 on: May 31, 2010, 03:58:26 pm »
Sorry jules. This was one I saw a while ago. I posted all the info I kept.
I was hoping someone would tell me why the crater appears to be circular. ;)

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Crater Questions
« Reply #93 on: May 31, 2010, 06:54:01 pm »
The big crater in this pic is really nice I think.  ;D


http://moonzoo.s3.amazonaws.com/v10/slices/000292937.jpg

# ID: AMZ1002ldg
# Latitude: 22.4794°
# Longitude: 25.343°
# Sun Angle: -73.02°
# Scale: 0.50 meters / pixel
# Zoom Level: 3 

weezerd

  • Sr. Member
  • ****
  • Posts: 315
Re: Crater Questions
« Reply #94 on: June 01, 2010, 12:39:26 pm »
Wahay! The first dark halo I've found!



000142849
Longitude: 30.7577
Latitude: 21.2628

IreneAnt

  • Science Team
  • Sr. Member
  • *****
  • Posts: 296
Re: Whoa
« Reply #95 on: June 01, 2010, 08:51:39 pm »


Is this as huge as it seems, or is this a fairly common site on the Moon?



Here's the info, in case it's really anything interesting.  It's close enough to the Apollo landing areas that I figure it's well documented.

Latitude: -9.54126°
Longitude: 15.5912°
Sun Angle: -75.58°
Scale: 4.41 meters / pixel

Hello DJ_59,

Fresh white craters are fairly common on the Moon, especially for smaller sizes. However, they are no-where near as common as older craters. And, they can be used to study a whole slew of things, like impact processes, pre-impact stratigraphy (rock layers), etc. So, in that respect, they are very interesting.

That said, this is a really cool picture. Thanks for posting it.

DJ_59

  • Sr. Member
  • ****
  • Posts: 440
Things that make you go 'Hmmmm'
« Reply #96 on: June 01, 2010, 09:03:56 pm »

This isn't a crater question, specifically, but... while doing Crater Survey, and after 20 or so images had been submitted, it went to bring up the next image and crashed.  It says "Loading Error 500: UrlNotFound".  I tried clicking on Crater Survey to reboot the process, but same thing.  I've noticed, also, that all my Moon Zoo tabs (I usually have three going at a time) tend to freeze several times a day, even though none of my other tabs do, and I have to shut them down and open new ones to start over.  Are these problems being experienced by anyone else here, or is it yet another painful display of my computer's overwhelming lameness? 

I swear, when I can finally afford a decent computer I'm going to enjoy the heck out of taking this outside and putting five or six bullets in it.



IreneAnt

  • Science Team
  • Sr. Member
  • *****
  • Posts: 296
Re: Crater Questions
« Reply #97 on: June 01, 2010, 09:04:41 pm »
Great image, Thornius. It looks a lot like the one that Tom128 posted, but fresher.
I'm starting to think that these craters form because of a strength difference between two layers in these areas. A weak, unconsolidated deposit, overlying a stronger layer? The impact has an easier time of excavating the unconsolidated layer than the underlying strong layer. Both these images come from mare areas. Maybe we're seeing the difference between the upper regolith (lunar soil) layer and lower unfractured mare layer?

The big crater in this pic is really nice I think.  ;D


http://moonzoo.s3.amazonaws.com/v10/slices/000292937.jpg

# ID: AMZ1002ldg
# Latitude: 22.4794°
# Longitude: 25.343°
# Sun Angle: -73.02°
# Scale: 0.50 meters / pixel
# Zoom Level: 3 

Here is a closer view of one of those interesting flattened craters, bottom right.  Is there a flattened mound in the center or something else?

 

ID: AMZ10034sc
Latitude: -3.48701°
Longitude: 336.566°

jules

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 3478
Re: Crater Questions
« Reply #98 on: June 01, 2010, 09:07:59 pm »

This isn't a crater question, specifically, but... while doing Crater Survey, and after 20 or so images had been submitted, it went to bring up the next image and crashed.  It says "Loading Error 500: UrlNotFound".  I tried clicking on Crater Survey to reboot the process, but same thing.  I've noticed, also, that all my Moon Zoo tabs (I usually have three going at a time) tend to freeze several times a day, even though none of my other tabs do, and I have to shut them down and open new ones to start over.  Are these problems being experienced by anyone else here, or is it yet another painful display of my computer's overwhelming lameness? 

I swear, when I can finally afford a decent computer I'm going to enjoy the heck out of taking this outside and putting five or six bullets in it.
I've noticed that Moon Zoo, especially My Moon Zoo, freezes if left open for a while too.
I'll copy this over to the Team Area.

Geoff

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 2143
  • The history of astronomy is a history of receding horizons. - Hubble.
Re: Things that make you go 'Hmmmm'
« Reply #99 on: June 01, 2010, 09:14:06 pm »

This isn't a crater question, specifically, but... while doing Crater Survey, and after 20 or so images had been submitted, it went to bring up the next image and crashed.  It says "Loading Error 500: UrlNotFound".  I tried clicking on Crater Survey to reboot the process, but same thing.  I've noticed, also, that all my Moon Zoo tabs (I usually have three going at a time) tend to freeze several times a day, even though none of my other tabs do, and I have to shut them down and open new ones to start over.  Are these problems being experienced by anyone else here, or is it yet another painful display of my computer's overwhelming lameness? 

I swear, when I can finally afford a decent computer I'm going to enjoy the heck out of taking this outside and putting five or six bullets in it.

It could be a memory problem - you need as much memory as you can afford in a PC/Mac especially if you're doing a lot of browser stuff with multiple tabs open.
You could try shutting down the browser every so often and clearing the cache - see if it helps.

I haven't noticed any of these problems but then I have a lot of memory to play with.

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Crater Questions
« Reply #100 on: June 01, 2010, 11:45:08 pm »
My memory's not as good as it used to be, and my memory's not as good as it used to be.

Tom128

  • IOTW posters
  • Hero Member
  • *
  • Posts: 677
Re: Crater Questions
« Reply #101 on: June 02, 2010, 01:32:39 am »


Another bright  fresh white.

 ID: AMZ1000f2i
 Latitude: 19.1826°
 Longitude: 30.9255°






Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Crater Questions
« Reply #102 on: June 02, 2010, 08:46:34 am »
Great image, Thornius. It looks a lot like the one that Tom128 posted, but fresher.
I'm starting to think that these craters form because of a strength difference between two layers in these areas. A weak, unconsolidated deposit, overlying a stronger layer? The impact has an easier time of excavating the unconsolidated layer than the underlying strong layer. Both these images come from mare areas. Maybe we're seeing the difference between the upper regolith (lunar soil) layer and lower unfractured mare layer?

The big crater in this pic is really nice I think.  ;D


http://moonzoo.s3.amazonaws.com/v10/slices/000292937.jpg

# ID: AMZ1002ldg
# Latitude: 22.4794°
# Longitude: 25.343°
# Sun Angle: -73.02°
# Scale: 0.50 meters / pixel
# Zoom Level: 3 

Here is a closer view of one of those interesting flattened craters, bottom right.  Is there a flattened mound in the center or something else?

 

ID: AMZ10034sc
Latitude: -3.48701°
Longitude: 336.566°

I thought that , too, Ireneant.  All my life I have loved throwing rocks in mud and dust and studying the craters they form.  This looks a lot like a crater formed by throwing a rock in dust overlying asphalt.  A hard surface underneath a soft powdery one.  Just think of ALL the iron and Peridot that could be found in and around the Lunar craters from meteorite impacts.  We could mine the craters for iron and other materials and I understand that many non-ferrous meteors are often full of Peridot crystals, a popular and attractive gemstone.

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Crater Questions
« Reply #103 on: June 02, 2010, 08:54:20 am »
An old weathered crater with a central peak in the lower center of this pic.


http://moonzoo.s3.amazonaws.com/v10/slices/000361447.jpg

# Latitude: 10.7451°
# Longitude: 312.408°
# Sun Angle: -82.46°
# Scale: 0.50 meters / pixel
# Zoom Level: 3 

Thornius

  • Sr. Member
  • ****
  • Posts: 437
  • Black Hole! WHAT black hoooo.....
Re: Crater Questions
« Reply #104 on: June 02, 2010, 09:09:04 am »
Big, SPECTACULAR impact craterr just off the picture to the left.  Really nice effect I think!


http://moonzoo.s3.amazonaws.com/v10/slices/000117648.jpg

# atitude: 12.5391°
# Longitude: 62.3438°
# Sun Angle: -66.52°
# Scale: 1.42 meters / pixel
# Zoom Level: 3