Starship Asterisk*

Am I seeing things, or are there some very square looking craters here?

http://antwrp.gsfc.nasa.gov/apod/ap070823.html

BTW, and FYI to all, here is another great site for looking at moon images.

The Lunar Picture Of the Day LPOD
http://www.lpod.org/

They recently had a great mention of Moretus also.
http://www.lpod.org/?m=20070819

they sure look square to me too

Why are there so many craters on the moon and how often do they hit?
We don't see as many on other planets do we?

Remember the Barringer Crater?
It looks sort of square also, , ,

http://antwrp.gsfc.nasa.gov/apod/ap971117.html
and again,
http://antwrp.gsfc.nasa.gov/apod/ap990711.html
and again, , , ,
http://antwrp.gsfc.nasa.gov/apod/ap070623.html

Yes, we do, and more on many bodies in our solar system, and then some bodies have very few , , hmmmm I wonder why?!?!?!



Norval

You forget the effects of atmosphere and weathering which removes the majority of all but the biggest impact events.

For me, I can't see any craters, only cones with their tops neatly sliced off.

I can't see craters, only cones with their tops neatly sliced off

Nick wrote:I can't see craters, only cones with their tops neatly sliced off

See if rotating the image helps. Sometimes shadowing from the opposite direction helps this effect.

I do see some square craters myself.. 8)

In a dense crater field such as that, the walls of newer craters distort the geometry of the older ones.

grayness wrote:Why are there so many craters on the moon and how often do they hit?
We don't see as many on other planets do we?

Oh, yes we do!
Even on Earth.

See this map, of just North America, and just the BIG craters that are still observable after weathering and geology: http://www.unb.ca/passc/ImpactDatabase/ ... erica.html

John

GGaskill wrote:In a dense crater field such as that, the walls of newer craters distort the geometry of the older ones.

Where is the dense field of craters with the "Barringer Crater"?

Interesting that the gas fields lie along the circular rim of this impact
http://www.unb.ca/passc/ImpactDatabase/images/avak.htm

http://antwrp.gsfc.nasa.gov/apod/ap070823.html

This picture shows lines in a NNE direction (if N was up) that almost look like dust blown by a wind. We all know that is unlikely if not impossible but then, what is the cause of the lines? Are they an artifact of the foreshortened perspective?

Look especially at the left middle area just left of the crater mentioned in the text. It is one of the brighter areas in the picture.

http://antwrp.gsfc.nasa.gov/apod/ap070823.html

Is it just me, or does anyone else have real problems resolving these kind of images as craters and not bumps?
It takes me a good few minutes of squinting and staring and looking at other details before I can perceive the craters as concave.

Does anyone else get this problem

Lucretia wrote:http://antwrp.gsfc.nasa.gov/apod/ap070823.html

Is it just me, or does anyone else have real problems resolving these kind of images as craters and not bumps?
It takes me a good few minutes of squinting and staring and looking at other details before I can perceive the craters as concave.

Does anyone else get this problem

Very common
http://www.badastronomy.com/bad/misc/ho ... m.html#con

After personally scrutinizing thousands or what might even be thousands upon thousands of images of planetary bodies in our solar system with similar markings, the goddess Nereid’s “modern concordance cosmological models” or the only “scientific game in town” would have you believe these strafe like marks (scarring) to be just a figment of your imagination.

William Roeder, you are directing Lucretia to Dr. Phil’s forum of deceit and lies.

This does illustrate the concave vs convex perception.
Example from that link:




But this does not, just more BA bull.

For reference here is the image from the APOD rotated 90 degrees clockwise:


Don Bush

Lets not forget the Lunar Eclipse for parts of the world on the 28th this month.

A figment of my imagination? That is possible. At my age there are several figments of my imagination lying around. However, you mentioned scarring. I don't know about scarring but a series of small meteorite strikes all coming from the same general direction might make sense.

Like the "face" on Mars, I need to see this same spot from a different angle. Any links to other pictures of the same area?

There is a Partial Solar Eclipse on September 11, 2007, also.

Partial Solar Eclipse

Oh fasinating, a live feed from NASA of the lunar eclipse on the 28th.



Path of the Moon through Earth's umbral and penumbral shadows during the Total Lunar Eclipse of Aug. 28, 2007.
(Pacific Daylight Time)

grayness wrote:Why are there so many craters on the moon and how often do they hit?
We don't see as many on other planets do we?

About 4 billion years ago, something happened that flung a lot of material into the inner Solar System. This was the Late Heavy Bombardment, which isn't well understood, but may be related to an orbital resonance between Jupiter and Saturn. In any case, most of the cratering in the Solar System, including that on the Moon, happened back then. It is preserved on the Moon, on Mercury, and maybe on some of Jupiter's and Saturn's large moons because they are airless and geologically stable. We don't see much on Venus, Earth, Mars, and many moons because they have active processes, either tectonic or atmospheric, that reshape the surface over millions or hundreds of millions of years (the process is slower on Mars, so we do see significant cratering, although much less than on the Moon).

Cratering since then has been much more sporadic and rare. Gravitational effects of the planets, especially Jupiter, serve to keep the inner Solar System relatively clear of debris. Small meteoroids hit the Moon regularly, but these are not large enough to make craters visible from Earth. Events large enough to produce craters ~1km across probably happen every few tens of thousands of years. Amateurs and professionals armed with video cameras and small telescopes record multiple impacts on the Moon during many meteor showers.

I just noticed that the crater at the bottom of the rotated image is hexagonal