Moon Has Iron Core, Lunar-Rock Study Says

National Geographic News ^ | January 11, 2007 | Brian Handwerk

[LiberConservative]

"Big whack"

I got a few of those from my dad when I was a kid.

[SunkenCiv]

sudbury impact

Google

[SunkenCiv]

:’) And yet...

“during the 200-million-year period of the late heavy bombardment, Earth suffered over 22,000 impact craters larger than 20 km, about 40 impact basins larger than 1,000 km, and several continent-sized, 5,000-km basins.”

http://www.daviddarling.info/encyclopedia/L/late_heavy_bombardment.html

[SunkenCiv]

lunar core

Google

[SunkenCiv]

Thanks.

[RedMonqey]

New evidence for the Moon’s soft middle

Which brings up the question:

How many licks does it take to get to the mantle (tootsie roll) center of the moon ?

[quadrant]

As I understand it the moon acts as a magnet; that is, its size and composition “magnet” attracting meteors that otherwise would crash into the earth.

[SunkenCiv]

Depends on the size of the tongue, and whether or not it’s a tongue of flame from an impact. :’)

[RedMonqey]

HeeHee. I suppose so.....

[SunkenCiv]

It doesn’t.

[Atlas Sneezed]

Imagine if all those impact craters visible on the surface of the moon were on the surface of the Earth.

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If earth had no air, water, or tectonic action, there would be just as many craters.

[SunkenCiv]

an update of sorts, courtesy of Fred Nerks:

new gravity map of the Earth