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When the Earth Had Two Moons [Pic+]

Hits: 4252 | Rating: (2.5) | Category: Science | Added by: ElectricEye
Jump to: Bottom    Last Post
7eggert
Male, 30-39, Europe
 137 Posts
Wednesday, June 11, 2014 12:07:55 AM
I've seen a presentation about it:

http://www.zdf.de/ ZDFmediathek/beitrag/ video/1503612/ Die-Rueckseite- des-Mondes-

First broadcast: 29.01.2012 ZDF

Runemang
Male, 30-39, Midwest US
 2608 Posts
Tuesday, June 10, 2014 6:36:01 PM


elkingo
Male, 30-39, Eastern US
 3402 Posts
Monday, June 09, 2014 7:51:44 PM


Runemang
Male, 30-39, Midwest US
 2608 Posts
Monday, June 09, 2014 4:40:54 PM
Yeah, I remember that. Back before internet. Damn that sucked.

drawman61
Male, 50-59, Europe
 6008 Posts
Monday, June 09, 2014 4:04:55 PM
The reason the 'moonrock' Nasa has tested is so like Earth rock is pretty obvious. It IS Earth rock.

ferdyfred
Male, 40-49, Europe
 11171 Posts
Monday, June 09, 2014 3:42:04 PM
OldOllie
---
Um, like he says !

OldOllie
Male, 60-69, Midwest US
 14351 Posts
Monday, June 09, 2014 2:58:01 PM
Quite an elaborate explanation for something that has been well understood for quite some time. The reason that the same side of the moon always faces earth is that the moon is tidally locked. It's a common configuration because it's center of mass is slightly offset from it's geometric center. Its heavy side faces the earth for the same reason that a ball that's heavier on one side will tend to come to rest on a table with the heaviest side at the bottom.

Also, the reason for the difference in the number of craters is that the earth acts like a gravitational lens that bends the paths of asteroids, comets, and meteors so that the near side actually received MORE large impacts than the far side. These larger impacts in the late stages of lunar formation broke through the crust allowing lava to flow out onto the surface and form the maria that we see from earth.

Zed68
Male, 40-49, Europe
 934 Posts
Monday, June 09, 2014 1:39:34 PM
Interesting !!!!

ElectricEye
Male, 40-49, Eastern US
 493 Posts
Sunday, June 08, 2014 3:03:26 PM
Link: When the Earth Had Two Moons [Pic+] [Rate Link] - A new model, "The Big Splat" explains the strange asymmetry of the moon.


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