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Stupid question maybe ?

PostPosted: Thu Dec 03, 2015 1:12 am
by PeterUK
Not sure if this is in the right place but . . .

I am totally new to all this so please be gentle if my question is stupid or has been asked before somewhere.

I have just been playing around with the Virtual moon atlas and noticed something that has me very puzzled. :suspicious:
Overall, the moon has craters spread fairly evenly across its surface EXCEPT for the two poles where they seem to be concentrated into a very small area.
It seems strange that nowhere else has such a large amount of impacts in TWO relatively small areas

So my question is . . . Why have these two areas had such a concentration of meteor strikes ?

Please and thank you

Re: Stupid question maybe ?

PostPosted: Thu Dec 03, 2015 3:30 pm
by HavenObs
Ah, not stupid at all.

Initially the Moon was bombarded all over by various bodies and had a fairly uniform distribution of craters of all sizes. Only later did the big impacts that caused the major mare basins on the surface occur - so the craters came (mostly) first and the mare second.

In fact - crater density is one way to gauge the age of parts of the Moon

Re: Stupid question maybe ?

PostPosted: Fri Dec 04, 2015 3:58 pm
by carastro
Part of the Moon are smooth because they think lava filled the areas (after the craters had formed).


Re: Stupid question maybe ?

PostPosted: Wed Dec 09, 2015 1:46 am
by PeterUK
Lava ? I thought the craters were impact sites from meteors

Re: Stupid question maybe ?

PostPosted: Wed Dec 09, 2015 2:01 am
by Dion
yes, but way back in the moons distant past, when it's middle was still molten, lava streamed out and filled in many of it's ancient craters, this is what caused the 'mares' or 'seas' such as the sea of tranquility where apollo landed, these are also those smoother darker areas you see naked eye on the moon.

Re: Stupid question maybe ?

PostPosted: Sat Aug 06, 2016 2:24 pm
by ronhall
As a newcomer myself I find reading the replies to other's "stupid questions" highly informative and I am sure I will also ask many questions some may seem stupid but please everyone keep asking as they help guys like me enormously.

Re: Stupid question maybe ?

PostPosted: Wed Aug 10, 2016 6:11 pm
by patthehorse
You can still see some of the old big craters in the Mare's, where the lava is just short of the rims, they appear like circular mountain ranges surrounded by the set lava.