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William Thompson
2011-Aug-06, 01:14 AM
The strange feature on the moon looks like the moon was once split in two and reformed. Or is it something else?

http://htmlimg3.scribdassets.com/6f09m2cweptpv28/images/1-d359494bd5/000.jpg

Middenrat
2011-Aug-06, 01:35 AM
Hi William, that's an enormous feature, do you have its name?
But it appears to be one ofthe Moon's many formations associated with vulcanism.
I haven't heard of any theories where the Moon actually cleaves, but a recent idea holds that we once had two Moons, both formed from the ejecta of a collision between proto-Earth and a Mars-sized planet billions of years ago.
Later as their orbits changed they themselves collided with a low enough velocity to ensure they 'stuck' largely, giving the Moon its characteristically different faces of Near and Far Side.
Hey, perhaps the canyon you're talking about originated in that period?

William Thompson
2011-Aug-06, 01:51 AM
There is a photo on NASA's website and the admission that scientists are clueless. I will try to find it.

R.A.F.
2011-Aug-06, 02:41 AM
The strange feature on the moon looks like the moon was once split in two and reformed. Or is it something else?

It is a feature known as a Rille...a collapsed lava tube. They are not uncommon on the Moon. The size of this feature is very tiny compared to the whole of the Moon, therefore no...it is not evidence that the moon was once split in two.


There is a photo on NASA's website...

Of a rille??


...and the admission that scientists are clueless.

I seriously doubt that.

William Thompson
2011-Aug-06, 07:28 PM
Actually, I seriously doubt that as well. I will try to find the Nasa page. I have found that the image has this tag:
Photo Credit: NASA/Apollo [0003-0612-0811-4328]

William Thompson
2011-Aug-06, 07:41 PM
I found the web page:
http://apod.nasa.gov/apod/ap021029.html

LaurelHS
2011-Aug-06, 08:36 PM
Just because something is "still a topic of research" does not mean scientists are "clueless" about it.

R.A.F.
2011-Aug-07, 01:29 AM
Actually, I seriously doubt that as well.

Then why did you post it?

slang
2011-Aug-07, 07:35 PM
I found the web page:
http://apod.nasa.gov/apod/ap021029.html

That's a 9 year old web page. It refers to a paper from 14 years ago. Presumably some more studies have been done on these features, using the data from the recent bunch of Moon orbiters. I can't tell from quick ADS search though.

deathtical
2011-Aug-15, 07:18 PM
I don't believe there is any credible evidence that the moon was ever split in two but I read an article a week or two ago that some scientist believe that there is evidence that the moon was hit by a smaller moon that no longer exists. I believe they said it happened a few billion years ago.If I can find the article again I'll post it.

deathtical
2011-Aug-15, 07:19 PM
Here it is...

http://www.space.com/12529-earth-2-moons-collision-moon-formation.html

Swift
2011-Aug-15, 08:43 PM
Here it is...

http://www.space.com/12529-earth-2-moons-collision-moon-formation.html
Also discussed in this thread (http://www.bautforum.com/showthread.php/119226-Earth-s-Long-Lost-Moon)

SkepticJ
2011-Aug-15, 10:34 PM
Nothing natural could split the moon into two pieces that are separated by a distance without it obliterating all the surface features on the moon.

So no, the moon hasn't been split in two.

Centaur
2011-Aug-16, 04:38 AM
The strange feature on the moon looks like the moon was once split in two and reformed. Or is it something else?

http://htmlimg3.scribdassets.com/6f09m2cweptpv28/images/1-d359494bd5/000.jpg

Whenever moon splitting questions arise we are reminded that there there are some people who want to believe that a certain piece of legendary lore has some basis in fact.

Link #1: http://cs.astronomy.com/asycs/forums/t/51631.aspx
Link #2: http://en.wikipedia.org/wiki/Splitting_of_the_moon

Flat Handle
2011-Nov-21, 08:44 PM
It looks awfully spherical - it would have to have been two very well-fitting pieces.

antoniseb
2011-Nov-21, 08:56 PM
I'm going to close this thread, because there is a major religious text that says that the Moon was split in two, and while there is no physical evidence that the Moon was split in two in any real sense in written history, it is hard to debate it here without sounding like we are trying to make a focused discrediting of something a lot of non-scientists believe.